1956 Mercury Custom Carburetor Parts

Product Features:

• The Edelbrock Accelerator Pump Diaphragm 30cc Gasoline #12400 for 4150 Carburetors Proper installation is the responsibility of the installer.
• Improper installation will void your warranty and may result in poor performance and engine or vehicle damage

The Edelbrock #12605 Non-Adjustable Inlet Needle and Seat assembly will fit carburetors with center hung fuel bowls and can be used as replacements or performance upgrades. Kit includes one locking screw, two gaskets and one O-ring. For use with Holley 23

Product Features:

• Center Hung Floats
• 0.11 in. Needle Diameter
• Viton® Needle Material
• Sold Individually
• Non-Adjustable Type

Product Features:

• The Edelbrock #12602 Adjustable Inlet Needle and Seat assembly will fit Carburetors with center hung fuel bowls and can be used as replacements or performance upgrades.
• Kit includes one locking screw, two gaskets and one O-ring. For use with Holley 2300, 4150, 4160, 4165, 4175 and 4500 Series, Quick Fuel 4500, Professional Series and Q-Series, as well as various Demon Carburetors.

Product Features:

• The Edelbrock #12380 Metering Block gasket is made of black nitrile material and will ensure a leak-free seal from your Carb to the metering block.
• The Edelbrock #12380 Metering Block gasket will fit 4150 &4160 Carburetors.
• These will not work with accelerator pump transfer tubes.

Product Features:

• The Edelbrock #12382 fuel bowl gasket is designed for Holley 2300, 4150, 4160, 4175 and 4500 Carburetors.
• Kit includes two black nitrile fuel bowl gaskets.

Product Features:

• The Edelbrock #12665 Single Stage 6.5 Hg Power Valve operates by using engine vacuum to control the opening and closing rate.
• During heavy load or under full power situations, they open to supply additional fuel to the main system to eliminate hesitation and bogging, ensuring the smooth delivery of power without any drivability concerns.

Product Features:

• The Edelbrock #12645 Single Stage 5.5 Hg Power Valve operates by using engine vacuum to control the opening and closing rate.
• During heavy load or under full power situations, they open to supply additional fuel to the main system to eliminate hesitation and bogging, ensuring the smooth delivery of power without any drivability concerns.

The Edelbrock No. 12685 Single Stage 8.5 Hg Power Valve operates by using engine vacuum to control the opening and closing rate. During heavy load or under full power situations, they open to supply additional fuel to the main system to eliminate hesitation and bogging, ensuring the smooth delivery of power without any drivability concerns.

The Edelbrock #12635 Single Stage 3.5 Hg Power Valve operates by using engine vacuum to control the opening and closing rate. During heavy load or under full power situations, they open to supply additional fuel to the main system to eliminate hesitation

Product Features:

• Gasket Or Seal Included
• 3.5 in. Hg Opening Vacuum
• Single Stage
• Standard Flow Type
• Made In The USA

The Edelbrock 94 Carburetor power valve block off #12624 is a great way to fine tune your vintage series carburetor. These Edelbrock Power valve Block Off’s will fit Edelbrock Vintage Series 94 carburetors as well as original Holley 94’s and its later var

Product Features:

• Fits Any Demon®, Holley®, And Quick Fuel® Carburetors
• Includes Gasket
• 1/2 in. x 28 Power Valve Thread
• For Applications That Prefer To Run Carbs Without The Power Valves
• Made In The USA

The Ultra Double Pumper Carburetors feature all aluminum construction and are equipped with metering blocks and a base plate made from 6061-T6 billet aluminum. Three different anodized color options (Red, Blue, or Black) allow for a personalized look while maintaining the ultra high strength and durability you get from billet. They weigh in at approximately 5 lbs less than a comparable zinc carburetor. The new Ultra Double Pumper Carburetors have an enhanced fuel curve for optimum performance, with many more features such as aluminum construction; anodized billet aluminum metering blocks and base plate; 4 corner idle for precise idle control; mechanical secondaries for great performance; clear fuel level sight plugs for easy, no mess fuel level adjustments; Ford automatic transmission kickdown for use on popular Ford transmissions; four vacuum ports for all necessary vacuum accessories; and for the first time on a Double Pumper, factory pre-set electric choke for easy, fast cold start-ups. The clean, polished look coupled with Red, Blue, or Black metering blocks and throttle body will certainly set your ride apart whether you are at the show or track. Dont trust your performance to just anyone, Holley is the only Modular carburetor company that has been in business for over 100 years and has powered every NASCAR champion since the 60s.

Product Features:

• Gold Dichromate Finish For Corrosion Resistance w/Classic Look
• Optimized Street/Strip Calibration That Works Out Of The Box
• Man. Choke Cable Hand Controlled For Cold Start Control
• Mechanical Secondaries For Awesome Tire Turning Performance
• Dual Accelerator Pumps For Add Fuel Under Initial Acceleration
• Dual Feed Fuel Inlets For Constant High Volume Fuel Delivery
• Lightweight Vehicles w/Auto Trans w/High Stall/Low Gearing
• 100% Wet Flow Tested By Holley Technicians

Square flange bolt pattern. Performance calibrated. The ultimate vacuum secondary street performance upgrade.

Product Features:

• Vibratory Polished For Good Looks
• Optimized Street Calibration That Works Out Of The Box
• Factory Preset Electric Choke For Easy Startups
• Quick Change Vacuum Housing Cap To Tune For Performance/Fuel Econ
• No Unnecessary Trips Back To The Parts Store
• Limited Lifetime Warranty
• 100% Wet Flow Tested By Holley Technicians
• Arrives Ready To Run

Replace your old carburetor with original Holley performance 4160 carburetors. Budget-minded enthusiasts, like you, will be rewarded with maximum performance from your stock or mildly-modified engine. These Holley 4160 adjustable float carburetors are easier to tune than full race carburetors with temperamental secondary metering blocks and dual pumps. Plus, they’re available in your choice of universal or direct fit OE replacement versions with all emission provisions. Bolt-on installation and improved performance; no wonder when car guys think of carburetors, they think of Holley 4160 carburetors!

Product Features:

• Universal Holley 4-Barrel Carburetor

One of the most widely used Holley carbs of all times -the 0-80508S! Its dual feed fuel inlets assure you get all the fuel you need and its 750 CFM of airflow makes it the perfect performance upgrade carb. Its vacuum secondaries and electric choke make it super easy to use on a wide range of vehicles. Don’t trust your performance to just anyone, Holley is the only modular carburetor company that has been in business for over 100 years and has powered every NASCAR champion since the 60’s.

Product Features:

• Vibratory Polished For Good Looks

Classic Holley carbs have been a staple for rodders around the world for decades. They’re calibrated for use on stock to mildly modified vehicles and have that classic Holley look. Holley’s 0-8007 is calibrated and intended for small V8s or 6 cylinder engines as well as 2×4 street tunnel ram style set ups. Plus, it is Gold Dichromate coated for durability and classic Holley looks. Don’t trust your performance to just anyone, Holley is the only modular carburetor company that has been in business for over 100 years and has powered every NASCAR champion since the 60’s.

Product Features:

• Gold Dichromate Finish For Corrosion Resistance w/Classic Look
• Factory Preset Elec Choke For Easy Startups
• For All Weights/Gearing/Trans For Smooth Open Of Secondaries
• Single Feed Fuel Inlet For Easy Installation
• Power Valve Blow-Out Protection
• Does Not Work w/A.O.D. Transmissions
• Installation/Tuning DVD Incl.

Square flange bolt pattern. Performance calibrated. The ultimate vacuum secondary street performance upgrade.

Product Features:

• Vibratory Polished For Good Looks
• Optimized Street Calibration That Works Out Of The Box
• Manual Choke For Precise Cold Start Control
• Quick Change Vacuum Housing Cap To Tune For Performance/Fuel Econ
• No Unnecessary Trips Back To The Parts Store
• Limited Lifetime Warranty
• 100% Wet Flow Tested By Holley Technicians
• Arrives Ready To Run

The Street HP uses the best features from Holley’s race Bred 4150 HP carbs, but tamed for street and light competition use. The contoured main body from the 4150 HP has a tumble polished shiny finish. The metering system includes a timed spark port for a vacuum advance distributor and is calibrated for a hot street and strip engine setup for outstanding throttle response and drivability. A street HP base plate is used so there are plenty of vacuum ports for power brakes, PCV, etc.

Product Features:

• Gold Dichromate Finish For Corrosion Resistance w/Classic Look
• Performance Upgrade For Stock To Mildly Modified Vehicles
• Universal calibration for easy bolt-on performance
• Man. Choke Cable Hand Controlled For Cold Start Control
• Vacuum Secondaries For Use On Wide Variety Of Vehicles
• Dual feed fuel inlets for constant high volume fuel delivery
• Power Valve Blow Out Protection
• 100% Wet Flow Tested By Holley Technicians
• Arrives Ready To Run

The Street HP uses the best features from Holley’s race Bred 4150 HP carbs, but tamed for street and light competition use. The contoured main body from the 4150 HP has a tumble polished shiny finish. The metering system includes a timed spark port for a

Product Features:

• Vibratory Polished Alum Good Looks/Weight Savings/Lasting Shine
• Performance Upgrade For Stock To Mildly Modified Vehicles
• Universal Calibration For Easy Bolt-On Performance
• Man. Choke Cable Hand Controlled For Cold Start Control
• Vacuum Secondaries For Use On Wide Variety Of Vehicles
• Single Feed Fuel Inlet For Easy Installation

The Street HP uses the best features from Holley’s race Bred 4150 HP carbs, but tamed for street and light competition use. The contoured main body from the 4150 HP has a tumble polished shiny finish. The metering system includes a timed spark port for a vacuum advance distributor and is calibrated for a hot street and strip engine setup for outstanding throttle response and drivability. A street HP base plate is used so there are plenty of vacuum ports for power brakes, PCV, etc.

Product Features:

• Gold Dichromate Finish For Corrosion Resistance w/Classic Look
• Performance Upgrade For Stock To Mildly Modified Vehicles
• Universal Calibration For Easy Bolt-On Performance
• Man. Choke Cable Hand Controlled For Cold Start Control
• Vacuum Secondaries For Use On Wide Variety Of Vehicles
• Single Feed Fuel Inlet For Easy Installation
• Power Valve Blow Out Protection
• 100% Wet Flow Tested By Holley Technicians
• Arrives Ready To Run
• Compensates For All Vehicle Weights Gearing/Transmissions

The off-road truck avenger is designed specifically for off-road applications. The unique fuel metering block eliminates fuel spillover through the boosters at extreme angles allowing for 40 degree climbing, 30 degree side hill maneuvers and nose-down descents to avoid hesitations, stalling and flooding typically associated with carbs in an off road environment. The 470 CFM off-road truck avenger is the perfect carburetor for 4 cylinder, V-6, and inline 6 cylinder engines. Viton(R) is a registered trademark of DuPont Performance Elastomers.

Product Features:

• Gold Dichromate Finish For Extreme Off Road Environments
• Single Feed Fuel Inlet For Ease Of Installation
• Optimized Off-Road Calibration That Works Out-Of-The-Box
• Factory Preset Electric Choke For Easy Startups
• Quick Change Vacuum Housing Cap To Tune For Performance/Fuel Econ
• One Piece Off-Road Vent Tube Eliminates Fuel Spillover
• Metering Block For Flood Free Op. 40 deg. Climb/30 deg. Side Hill
• Limited Lifetime Warranty Defects In Material/Workmanship

The Ultra Double Pumper Carburetors feature all aluminum construction and are equipped with metering blocks and a base plate made from 6061-T6 billet aluminum. Three different anodized color options (Red, Blue, or Black) allow for a personalized look while maintaining the ultra high strength and durability you get from billet. They weigh in at approximately 5 lbs less than a comparable zinc carburetor. The new Ultra Double Pumper Carburetors have an enhanced fuel curve for optimum performance, with many more features such as aluminum construction; anodized billet aluminum metering blocks and base plate; 4 corner idle for precise idle control; mechanical secondaries for great performance; clear fuel level sight plugs for easy, no mess fuel level adjustments; Ford automatic transmission kickdown for use on popular Ford transmissions; four vacuum ports for all necessary vacuum accessories; and for the first time on a Double Pumper, factory pre-set electric choke for easy, fast cold start-ups. The clean, polished look coupled with Red, Blue, or Black metering blocks and throttle body will certainly set your ride apart whether you are at the show or track. Dont trust your performance to just anyone, Holley is the only Modular carburetor company that has been in business for over 100 years and has powered every NASCAR champion since the 60s.

Product Features:

• Gold Dichromate Finish For Corrosion Resistance w/Classic Look
• Optimized Street/Strip Calibration That Works Out Of The Box
• Manual Choke For Precise Cold Start Control
• Mechanical Secondaries For Awesome Tire Turning Performance
• 4 Corner Idle Allows You To Precisely Control Your Idle System
• Dual Accelerator Pumps For Add. Fuel Under Initial Acceleration
• Dual Feed Fuel Inlets For Constant High Volume Fuel Delivery
• Lightweight Vehicles w/Auto Trans w/High Stall/Low Gearing

Square flange bolt pattern. Performance calibrated. The ultimate vacuum secondary street performance upgrade.

Product Features:

• Features A Tumble Polished Finish Can Also Be Hand Polished
• Optimized Street Calibration That Works Out Of The Box
• Factory Preset Electric Choke For Easy Startups
• Glass Fuel Level Sight Windows For Easy Safe Float Adjustments
• Quick Change Vacuum Housing Cap To Tune For Performance/Fuel Econ
• 4 Corner Idle Allows You To Precisely Control Your Idle System
• No Unnecessary Trips Back To The Parts Store
• Limited Lifetime Warranty
• 100% Wet Flow Tested By Holley Technicians

Square flange bolt pattern. Performance calibrated. The ultimate vacuum secondary street performance upgrade.

Product Features:

• Vibratory Polished For Good Looks
• Optimized Street Calibration That Works Out Of The Box
• Manual Choke For Precise Cold Start Control
• Quick Change Vacuum Housing Cap To Tune For Performance/Fuel Econ
• No Unnecessary Trips Back To The Parts Store
• Limited Lifetime Warranty
• 100% Wet Flow Tested By Holley Technicians

The Street HP uses the best features from Holley’s race Bred 4150 HP carbs, but tamed for street and light competition use. The contoured main body from the 4150 HP has a tumble polished shiny finish. The metering system includes a timed spark port for a vacuum advance distributor and is calibrated for a hot street and strip engine setup for outstanding throttle response and drivability. A street HP base plate is used so there are plenty of vacuum ports for power brakes, PCV, etc.

Product Features:

• Vibrant Polished Alum Good Looks/Weight Savings/Lasting Shine
• Performance Upgrade For Stock To Mildly Modified Vehicles
• Universal Calibration For Easy Bolt-On Performance
• Factory Preset Electric Choke For Easy Startups
• For All Weights/Gearing/Trans For Smooth Open Of Secondaries
• Dual Feed Fuel Inlets For Constant High Volume Fuel Delivery
• Power Valve Blow-Out Protection
• Clear Fuel Level Sight Glasses
• 100% Wet Flow Tested By Holley Technicians
• Arrives Ready To Run

The Street HP uses the best features from Holley’s race Bred 4150 HP carbs, but tamed for street and light competition use. The contoured main body from the 4150 HP has a tumble polished shiny finish. The metering system includes a timed spark port for a vacuum advance distributor and is calibrated for a hot street and strip engine setup for outstanding throttle response and drivability. A street HP base plate is used so there are plenty of vacuum ports for power brakes, PCV, etc.

Product Features:

• Vibrant Polished Alum Good Looks/Weight Savings/Lasting Shine
• Performance Upgrade For Stock To Mildly Modified Vehicles
• Universal Calibration For Easy Bolt-On Performance
• Factory Preset Electric Choke For Easy Startups
• For All Weights/Gearing/Trans For Smooth Open Of Secondaries
• Single Feed Fuel Inlet For Easy Installation
• Power Valve Blow-Out Protection
• 100% Wet Flow Tested By Holley Technicians

The Gen 3 utilizes high capacity fuel bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, 12 hole billet booster inserts, fully tunable billet metering blocks, adjustable external linkage, throttle position sensor mounting points and knurled (hand adjustable) curb idle screws Each calibration has been dyno and track tested to deliver proven performance!

Product Features:

• All Aluminum Construction Saves 3.8 lbs. Over Original Models
• 28% Weight Savings
• Calibrations For Todays Larger Race Engines and New Fuels
• Fully Machined From Venturi Throat To Throttle Bore
• Integrated Idle Bypass Valve Allows For Adjustment Of Idle
• 12 Hole Billet Booster Superior Atomization/Throttle Response
• Metering Blocks Feature Improved True Gasket Sealing
• Dual 50CC Accelerator Pumps Fuel From Idle To Full Throttle
• Fuel Bowl Provides 20% More Fuel Capacity Controls Slosh
• Clear Sight Windows On Sides Of Bowl For Fuel Level Adjustments
• Drain Plug On Bowl Provides Easy Access To Empty Bowl
• Contoured Hex Head Squirter Screws For Streamlined Airflow

The Gen 3 utilizes high capacity fuel bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, 12 hole billet booster inserts, fully tunable billet metering blocks, adjustable external linkage, throttle position sensor mounting points and knurled (hand adjustable) curb idle screws Each calibration has been dyno and track tested to deliver proven performance!

Product Features:

• All Aluminum Construction Saves 3.8 lbs. Over Original Models
• 28% Weight Savings
• Calibrations For Todays Larger Race Engines and New Fuels
• Fully Machined From Venturi Throat To Throttle Bore
• Integrated Idle Bypass Valve Allows For Adjustment Of Idle
• 12 Hole Billet Booster Superior Atomization/Throttle Response
• Metering Blocks Feature Improved True Gasket Sealing
• Dual 50CC Accelerator Pumps Fuel From Idle To Full Throttle
• Fuel Bowl Provides 20% More Fuel Capacity Controls Slosh
• Clear Sight Windows On Sides Of Bowl For Fuel Level Adjustments
• Drain Plug On Bowl Provides Easy Access To Empty Bowl
• Contoured Hex Head Squirter Screws For Streamlined Airflow

The Gen 3 utilizes high capacity fuel bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, 12 hole billet booster inserts, fully tunable billet metering blocks, adjustable external linkage, throttle position sensor mounting points and knurled (hand adjustable) curb idle screws Each calibration has been dyno and track tested to deliver proven performance!

Product Features:

• All Aluminum Construction Saves 3.8 lbs. Over Original Models
• 28% Weight Savings
• Calibrations For Todays Larger Race Engines and New Fuels
• Fully Machined From Venturi Throat To Throttle Bore
• Integrated Idle Bypass Valve Allows For Adjustment Of Idle
• 12 Hole Billet Booster Superior Atomization/Throttle Response
• Metering Blocks Feature Improved True Gasket Sealing
• Dual 50CC Accelerator Pumps Fuel From Idle To Full Throttle
• Fuel Bowl Provides 20% More Fuel Capacity Controls Slosh
• Clear Sight Windows On Sides Of Bowl For Fuel Level Adjustments
• Drain Plug On Bowl Provides Easy Access To Empty Bowl
• Contoured Hex Head Squirter Screws For Streamlined Airflow

The Gen 3 utilizes high capacity fuel bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, 12 hole billet booster inserts, fully tunable billet metering blocks, adjustable external linkage, throttle position sensor mounting points and knurled (hand adjustable) curb idle screws Each calibration has been dyno and track tested to deliver proven performance!

Product Features:

• All Aluminum Construction Saves 3.8 lbs. Over Original Models
• 28% Weight Savings
• Calibrations For Todays Larger Race Engines and New Fuels
• Fully Machined From Venturi Throat To Throttle Bore
• Integrated Idle Bypass Valve Allows For Adjustment Of Idle
• 12 Hole Billet Booster Superior Atomization/Throttle Response
• Metering Blocks Feature Improved True Gasket Sealing
• Dual 50CC Accelerator Pumps Fuel From Idle To Full Throttle
• Fuel Bowl Provides 20% More Fuel Capacity Controls Slosh
• Clear Sight Windows On Sides Of Bowl For Fuel Level Adjustments
• Drain Plug On Bowl Provides Easy Access To Empty Bowl
• Contoured Hex Head Squirter Screws For Streamlined Airflow

The Gen 3 utilizes high capacity fuel bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, 12 hole billet booster inserts, fully tunable billet metering blocks, adjustable external linkage, throttle position sensor mounting points and knurled (hand adjustable) curb idle screws Each calibration has been dyno and track tested to deliver proven performance!

Product Features:

• All Aluminum Construction Saves 3.8 lbs. Over Original Models
• 28% Weight Savings
• Calibrations For Todays Larger Race Engines and New Fuels
• Fully Machined From Venturi Throat To Throttle Bore
• Integrated Idle Bypass Valve Allows For Adjustment Of Idle
• 12 Hole Billet Booster Superior Atomization/Throttle Response
• Metering Blocks Feature Improved True Gasket Sealing
• Dual 50CC Accelerator Pumps Fuel From Idle To Full Throttle
• Fuel Bowl Provides 20% More Fuel Capacity Controls Slosh
• Clear Sight Windows On Sides Of Bowl For Fuel Level Adjustments
• Drain Plug On Bowl Provides Easy Access To Empty Bowl
• Contoured Hex Head Squirter Screws For Streamlined Airflow

The Gen 3 utilizes high capacity fuel bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, 12 hole billet booster inserts, fully tunable billet metering blocks, adjustable external linkage, throttle position sensor mounting points and knurled (hand adjustable) curb idle screws Each calibration has been dyno and track tested to deliver proven performance!

Product Features:

• All Aluminum Construction Saves 3.8 lbs. Over Original Models
• 28% Weight Savings
• Calibrations For Todays Larger Race Engines and New Fuels
• Fully Machined From Venturi Throat To Throttle Bore
• Integrated Idle Bypass Valve Allows For Adjustment Of Idle
• 12 Hole Billet Booster Superior Atomization/Throttle Response
• Metering Blocks Feature Improved True Gasket Sealing
• Dual 50CC Accelerator Pumps Fuel From Idle To Full Throttle
• Fuel Bowl Provides 20% More Fuel Capacity Controls Slosh
• Clear Sight Windows On Sides Of Bowl For Fuel Level Adjustments
• Drain Plug On Bowl Provides Easy Access To Empty Bowl
• Contoured Hex Head Squirter Screws For Streamlined Airflow

The Gen 3 utilizes high capacity fuel bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, 12 hole billet booster inserts, fully tunable billet metering blocks, adjustable external linkage, throttle position sensor mounting points and knurled (hand adjustable) curb idle screws Each calibration has been dyno and track tested to deliver proven performance!

Product Features:

• All Aluminum Construction Saves 3.8 lbs. Over Original Models
• 28% Weight Savings
• Calibrations For Todays Larger Race Engines and New Fuels
• Fully Machined From Venturi Throat To Throttle Bore
• Integrated Idle Bypass Valve Allows For Adjustment Of Idle
• 12 Hole Billet Booster Superior Atomization/Throttle Response
• Metering Blocks Feature Improved True Gasket Sealing
• Dual 50CC Accelerator Pumps Fuel From Idle To Full Throttle
• Fuel Bowl Provides 20% More Fuel Capacity Controls Slosh
• Clear Sight Windows On Sides Of Bowl For Fuel Level Adjustments
• Drain Plug On Bowl Provides Easy Access To Empty Bowl
• Contoured Hex Head Squirter Screws For Streamlined Airflow

The Gen 3 utilizes high capacity fuel bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, 12 hole billet booster inserts, fully tunable billet metering blocks, adjustable external linkage, throttle position sensor mounting points and knurled (hand adjustable) curb idle screws Each calibration has been dyno and track tested to deliver proven performance!

Product Features:

• All Aluminum Construction Saves 3.8 lbs. Over Original Models
• 28% Weight Savings
• Calibrations For Todays Larger Race Engines and New Fuels
• Fully Machined From Venturi Throat To Throttle Bore
• Integrated Idle Bypass Valve Allows For Adjustment Of Idle
• 12 Hole Billet Booster Superior Atomization/Throttle Response
• Metering Blocks Feature Improved True Gasket Sealing
• Dual 50CC Accelerator Pumps Fuel From Idle To Full Throttle
• Fuel Bowl Provides 20% More Fuel Capacity Controls Slosh
• Clear Sight Windows On Sides Of Bowl For Fuel Level Adjustments
• Drain Plug On Bowl Provides Easy Access To Empty Bowl
• Contoured Hex Head Squirter Screws For Streamlined Airflow

The Gen 3 utilizes high capacity fuel bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, 12 hole billet booster inserts, fully tunable billet metering blocks, adjustable external linkage, throttle position sensor mounting points and knurled (hand adjustable) curb idle screws Each calibration has been dyno and track tested to deliver proven performance!

Product Features:

• All Aluminum Construction Saves 3.8 lbs. Over Original Models
• 28% Weight Savings
• Calibrations For Todays Larger Race Engines and New Fuels
• Fully Machined From Venturi Throat To Throttle Bore
• Integrated Idle Bypass Valve Allows For Adjustment Of Idle
• 12 Hole Billet Booster Superior Atomization/Throttle Response
• Metering Blocks Feature Improved True Gasket Sealing
• Dual 50CC Accelerator Pumps Fuel From Idle To Full Throttle
• Fuel Bowl Provides 20% More Fuel Capacity Controls Slosh
• Clear Sight Windows On Sides Of Bowl For Fuel Level Adjustments
• Drain Plug On Bowl Provides Easy Access To Empty Bowl
• Contoured Hex Head Squirter Screws For Streamlined Airflow

Xtreme Performance – Holley Ultra XP(TM) Circle Track Carburetors! Ultra XP carbs are 38% lighter than our original HP, have fuel capacity that is 20% greater and 30 other new features! They’re available in our Hard Core Gray(TM) hard coat anodized finish with Black(TM) billet for improved corrosion protection & also available in natural tumble-polished aluminum with Black(TM) metering blocks and base plate. The Aluminum Ultra XP Cirlce Tracks are available in 650 & 750 CFM’s. Holley Ultra XP carburetors are Specifically Calibrated for Circle Track & offer new features such as anti-siphon valve in the main body; high capacity HP bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, fully tunable billet metering blocks, billet base plate, wedge floats, adjustable secondary linkage and knurled (hand adjustable) curb idle screws. Holley Ultra XP carburetors are the ultimate in square bore race carburetors!

Product Features:

• Aluminum Construction
• Saves 4.5 Pounds 38% Weight Savings
• Contoured Venturi Inlet Balances Airflow For Increased hp
• Air Bleeds Moved Outward For Smoother Transition Of Airflow
• Metering Blocks/True Gasket Sealing/Fully Adjustable
• Idle Bypass Valve Eliminates Holes In Throttle Plates
• Dual 30CC Accelerator Pumps Fuel From Idle To Full Throttle
• Fuel Bowls Provide 20% More Fuel Capacity Controls Slosh
• Clear Sight Windows On Both Sides Of Bowls For Safe Fuel Level
• Drain Plug On Bowl Provides Easy Access To Empty Bowl
• 8AN O-Ringed Inlet Threads Offer A Variety Of Plumbing Options
• 4 Corner Idle Allows You To Precisely Control Your Idle System

Xtreme Performance – Holley Ultra XP(TM) Circle Track Carburetors! Ultra XP carbs are 38% lighter than our original HP, have fuel capacity that is 20% greater and 30 other new features! They’re available in our Hard Core Gray(TM) hard coat anodized finish with Black(TM) billet for improved corrosion protection & also available in natural tumble-polished aluminum with Black(TM) metering blocks and base plate. The Aluminum Ultra XP Cirlce Tracks are available in 650 & 750 CFM’s. Holley Ultra XP carburetors are Specifically Calibrated for Circle Track & offer new features such as anti-siphon valve in the main body; high capacity HP bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, fully tunable billet metering blocks, billet base plate, wedge floats, adjustable secondary linkage and knurled (hand adjustable) curb idle screws. Holley Ultra XP carburetors are the ultimate in square bore race carburetors!

Product Features:

• Aluminum Construction
• Saves 4.5 Pounds 38% Weight Savings
• Contoured Venturi Inlet Balances Airflow For Increased hp
• Air Bleeds Moved Outward For Smoother Transition Of Airflow
• Metering Blocks/True Gasket Sealing/Fully Adjustable
• Idle Bypass Valve Eliminates Holes In Throttle Plates
• Dual 30CC Accelerator Pumps Fuel From Idle To Full Throttle
• Fuel Bowls Provide 20% More Fuel Capacity Controls Slosh
• Clear Sight Windows On Both Sides Of Bowls For Safe Fuel Level
• Drain Plug On Bowl Provides Easy Access To Empty Bowl
• 8AN O-Ringed Inlet Threads Offer A Variety Of Plumbing Options
• 4 Corner Idle Allows You To Precisely Control Your Idle System

Xtreme Performance – Holley Ultra XP(TM) Circle Track Carburetors! Ultra XP carbs are 38% lighter than our original HP, have fuel capacity that is 20% greater and 30 other new features! They’re available in our Hard Core Gray(TM) hard coat anodized finish with Black(TM) billet for improved corrosion protection & also available in natural tumble-polished aluminum with Black(TM) metering blocks and base plate. The Aluminum Ultra XP Cirlce Tracks are available in 650 & 750 CFM’s. Holley Ultra XP carburetors are Specifically Calibrated for Circle Track & offer new features such as anti-siphon valve in the main body; high capacity HP bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, fully tunable billet metering blocks, billet base plate, wedge floats, adjustable secondary linkage and knurled (hand adjustable) curb idle screws. Holley Ultra XP carburetors are the ultimate in square bore race carburetors!

Product Features:

• Aluminum Construction
• Saves 4.5 Pounds 38% Weight Savings
• Contoured Venturi Inlet Balances Airflow For Increased hp
• Air Bleeds Moved Outward For Smoother Transition Of Airflow
• Metering Blocks/True Gasket Sealing/Fully Adjustable
• Idle Bypass Valve Eliminates Holes In Throttle Plates
• Dual 30CC Accelerator Pumps Fuel From Idle To Full Throttle
• Fuel Bowls Provide 20% More Fuel Capacity Controls Slosh
• Clear Sight Windows On Both Sides Of Bowls For Safe Fuel Level
• Drain Plug On Bowl Provides Easy Access To Empty Bowl
• 8AN O-Ringed Inlet Threads Offer A Variety Of Plumbing Options
• 4 Corner Idle Allows You To Precisely Control Your Idle System

Xtreme Performance – Holley Ultra XP(TM) Circle Track Carburetors! Ultra XP carbs are 38% lighter than our original HP, have fuel capacity that is 20% greater and 30 other new features! They’re available in our Hard Core Gray(TM) hard coat anodized finish with Black(TM) billet for improved corrosion protection & also available in natural tumble-polished aluminum with Black(TM) metering blocks and base plate. The Aluminum Ultra XP Cirlce Tracks are available in 650 & 750 CFM’s. Holley Ultra XP carburetors are Specifically Calibrated for Circle Track & offer new features such as anti-siphon valve in the main body; high capacity HP bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, fully tunable billet metering blocks, billet base plate, wedge floats, adjustable secondary linkage and knurled (hand adjustable) curb idle screws. Holley Ultra XP carburetors are the ultimate in square bore race carburetors!

Product Features:

• Aluminum Construction
• Saves 4.5 Pounds 38% Weight Savings
• Contoured Venturi Inlet Balances Airflow For Increased hp
• Air Bleeds Moved Outward For Smoother Transition Of Airflow
• Metering Blocks/True Gasket Sealing/Fully Adjustable
• Idle Bypass Valve Eliminates Holes In Throttle Plates
• Dual 30CC Accelerator Pumps Fuel From Idle To Full Throttle
• Fuel Bowls Provide 20% More Fuel Capacity Controls Slosh
• Clear Sight Windows On Both Sides Of Bowls For Safe Fuel Level
• Drain Plug On Bowl Provides Easy Access To Empty Bowl
• 8AN O-Ringed Inlet Threads Offer A Variety Of Plumbing Options
• 4 Corner Idle Allows You To Precisely Control Your Idle System

Holley engineers have taken the state-of-the-art Gen 3 Ultra carburetors and created a budget friendly version that is perfect for street/strip applications as well as all out bracket or sportsman drag cars. The new Holley SP Dominator carburetors feature the patent pending Gen 3 main-body which is 5/16″ taller than the previous generation! This new height allowed for larger radius air entries to deliver smoother flow that equates to improved throttle response and consistency. An extended air cleaner flange is incorporated for easy air scoop attachment when using the available air scoop adapter. Other features include all aluminum construction, tunable billet metering blocks, throttle position sensor mounting points and knurled (hand adjustable) curb idle screws. Each calibration has been dyno and track tested to deliver proven performance!

Product Features:

• All Aluminum Construction Saves 3.8 lbs. Over Original Models
• 28% Weight Savings
• Shiny With Billet Aluminum Metering Block and Black Hardware
• Calibrations Optimized For Todays Race Engines and New Fuels
• Fully Machined From Venturi Throat To Throttle Bore For Perf
• Annular Booster Deliver Excellent Signal and Throttle Response
• Screw In Air Bleeds Offer Precise Tuning Capabilities
• Metering Blocks Feature Improved True Gasket Sealing
• Dual 50CC Accelerator Pumps Fuel From Idle To Full Throttle
• 4 Corner Idle Allows You To Precisely Control Your Idle System
• Clear Sight Windows On Fuel Inlet Side For Fuel Level Adjustment
• Notched Float and Jet Extension Are Factory Installed

Holley engineers have taken the state-of-the-art Gen 3 Ultra carburetors and created a budget friendly version that is perfect for street/strip applications as well as all out bracket or sportsman drag cars. The new Holley SP Dominator carburetors feature the patent pending Gen 3 main-body which is 5/16″ taller than the previous generation! This new height allowed for larger radius air entries to deliver smoother flow that equates to improved throttle response and consistency. An extended air cleaner flange is incorporated for easy air scoop attachment when using the available air scoop adapter. Other features include all aluminum construction, tunable billet metering blocks, throttle position sensor mounting points and knurled (hand adjustable) curb idle screws. Each calibration has been dyno and track tested to deliver proven performance!

Product Features:

• All Aluminum Construction Saves 3.8 lbs. Over Original Models
• 28% Weight Savings
• Shiny With Billet Aluminum Metering Block and Black Hardware
• Calibrations Optimized For Todays Race Engines and New Fuels
• Fully Machined From Venturi Throat To Throttle Bore For Perf
• Annular Booster Deliver Excellent Signal and Throttle Response
• Screw In Air Bleeds Offer Precise Tuning Capabilities
• Metering Blocks Feature Improved True Gasket Sealing
• Dual 50CC Accelerator Pumps Fuel From Idle To Full Throttle
• 4 Corner Idle Allows You To Precisely Control Your Idle System
• Clear Sight Windows On Fuel Inlet Side For Fuel Level Adjustment
• Notched Float and Jet Extension Are Factory Installed

Xtreme Performance – Holley Ultra XP(TM) Circle Track Carburetors! Ultra XP carbs are 38% lighter than our original HP, have fuel capacity that is 20% greater and 30 other new features! They’re available in our Hard Core Gray(TM) hard coat anodized finish with Black(TM) billet for improved corrosion protection & also available in natural tumble-polished aluminum with Black(TM) metering blocks and base plate. The Aluminum Ultra XP Cirlce Tracks are available in 650 & 750 CFM’s. Holley Ultra XP carburetors are Specifically Calibrated for Circle Track & offer new features such as anti-siphon valve in the main body; high capacity HP bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, fully tunable billet metering blocks, billet base plate, wedge floats, adjustable secondary linkage and knurled (hand adjustable) curb idle screws. Holley Ultra XP carburetors are the ultimate in square bore race carburetors!

Product Features:

• Aluminum Construction
• Saves 4.5 Pounds 38% Weight Savings
• Contoured Venturi Inlet Balances Airflow For Increased hp
• Air Bleeds Moved Outward For Smoother Transition Of Airflow
• Metering Blocks/True Gasket Sealing/Fully Adjustable
• Idle Bypass Valve Eliminates Holes In Throttle Plates
• Dual 30CC Accelerator Pumps Fuel From Idle To Full Throttle
• Fuel Bowls Provide 20% More Fuel Capacity Controls Slosh
• Clear Sight Windows On Both Sides Of Bowls For Safe Fuel Level
• Drain Plug On Bowl Provides Easy Access To Empty Bowl
• 8AN O-Ringed Inlet Threads Offer A Variety Of Plumbing Options
• 4 Corner Idle Allows You To Precisely Control Your Idle System

Holley engineers have taken the state-of-the-art Gen 3 Ultra carburetors and created a budget friendly version that is perfect for street/strip applications as well as all out bracket or sportsman drag cars. The new Holley SP Dominator carburetors feature the patent pending Gen 3 main-body which is 5/16″ taller than the previous generation! This new height allowed for larger radius air entries to deliver smoother flow that equates to improved throttle response and consistency. An extended air cleaner flange is incorporated for easy air scoop attachment when using the available air scoop adapter. Other features include all aluminum construction, tunable billet metering blocks, throttle position sensor mounting points and knurled (hand adjustable) curb idle screws. Each calibration has been dyno and track tested to deliver proven performance!

Product Features:

• All Aluminum Construction Saves 3.8 lbs. Over Original Models
• 28% Weight Savings
• Shiny With Billet Aluminum Metering Block and Black Hardware
• Calibrations Optimized For Todays Race Engines and New Fuels
• Fully Machined From Venturi Throat To Throttle Bore For Perf
• Annular Booster Deliver Excellent Signal and Throttle Response
• Screw In Air Bleeds Offer Precise Tuning Capabilities
• Metering Blocks Feature Improved True Gasket Sealing
• Dual 50CC Accelerator Pumps Fuel From Idle To Full Throttle
• 4 Corner Idle Allows You To Precisely Control Your Idle System
• Clear Sight Windows On Fuel Inlet Side For Fuel Level Adjustment
• Notched Float and Jet Extension Are Factory Installed

Xtreme Performance – Holley Ultra XP(TM) Circle Track Carburetors! Ultra XP carbs are 38% lighter than our original HP, have fuel capacity that is 20% greater and 30 other new features! They’re available in our Hard Core Gray(TM) hard coat anodized finish with Black(TM) billet for improved corrosion protection & also available in natural tumble-polished aluminum with Black(TM) metering blocks and base plate. The Aluminum Ultra XP Cirlce Tracks are available in 650 & 750 CFM’s. Holley Ultra XP carburetors are Specifically Calibrated for Circle Track & offer new features such as anti-siphon valve in the main body; high capacity HP bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, fully tunable billet metering blocks, billet base plate, wedge floats, adjustable secondary linkage and knurled (hand adjustable) curb idle screws. Holley Ultra XP carburetors are the ultimate in square bore race carburetors!

Product Features:

• Aluminum Construction
• Saves 4.5 Pounds 38% Weight Savings
• Contoured Venturi Inlet Balances Airflow For Increased hp
• Air Bleeds Moved Outward For Smoother Transition Of Airflow
• Metering Blocks/True Gasket Sealing/Fully Adjustable
• Idle Bypass Valve Eliminates Holes In Throttle Plates
• Dual 30CC Accelerator Pumps Fuel From Idle To Full Throttle
• Fuel Bowls Provide 20% More Fuel Capacity Controls Slosh
• Clear Sight Windows On Both Sides Of Bowls For Safe Fuel Level
• Drain Plug On Bowl Provides Easy Access To Empty Bowl
• 8AN O-Ringed Inlet Threads Offer A Variety Of Plumbing Options
• 4 Corner Idle Allows You To Precisely Control Your Idle System

Xtreme Performance – Holley Ultra XP(TM) Circle Track Carburetors! Ultra XP carbs are 38% lighter than our original HP, have fuel capacity that is 20% greater and 30 other new features! They’re available in our Hard Core Gray(TM) hard coat anodized finish with Black(TM) billet for improved corrosion protection & also available in natural tumble-polished aluminum with Black(TM) metering blocks and base plate. The Aluminum Ultra XP Cirlce Tracks are available in 650 & 750 CFM’s. Holley Ultra XP carburetors are Specifically Calibrated for Circle Track & offer new features such as anti-siphon valve in the main body; high capacity HP bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, fully tunable billet metering blocks, billet base plate, wedge floats, adjustable secondary linkage and knurled (hand adjustable) curb idle screws. Holley Ultra XP carburetors are the ultimate in square bore race carburetors!

Product Features:

• Aluminum Construction
• Saves 4.5 Pounds 38% Weight Savings
• Has A Set Screw In The Base Plate For Wide Open Throttle Stop
• Throttle Shafts Rides In Oil Smooth Throttle Actuation
• Metering Blocks/True Gasket Sealing/Fully Adjustable
• Contoured Venturi Inlet Balances Airflow For Increased hp
• Air Bleeds Moved Outward Allow Smoother Transition Of Airflow
• Metering Blocks Feature Durability True Gasket Sealing
• Idle Bypass Valve Eliminates Need For Holes In Throttle Plates
• Dual 30CC Accelerator Pumps Fuel From Idle To Full Throttle
• Fuel Bowls Provide 20% More Fuel Capacity Controls Slosh
• Clear Sight Windows For Easy/Safe Fuel Level Adjustments

Holley Double Pumper(R) carburetors are a perfect performance upgrade for hot street cars and race vehicles. Double Pumper carburetors are an American icon when it comes to performance carburetors. From their roots as the premier carburetor on many factory muscle cars to powering thousands of vehicles across the finish line, the Double Pumper is a great choice whether you are burning up the street or the quarter mile.

Product Features:

• Metering Blocks Base Plate For Good Looks True Gasket Sealing
• Optimized Street/Strip Calibration That Works Out Of The Box
• Factory Preset Electric Choke For Easy Startups
• Mechanical Secondaries For Awesome Tire Turning Performance
• 4 Corner Idle Allows You To Precisely Control Your Idle System
• Clear Fuel Level Sight Glass No Mess Fuel Level Adjustments
• Aluminum Construction For A 43% Weight Savings
• Lightweight Vehicles w/Auto Trans w/High Stall/Low Gearing
• 100% Wet Flow Tested By Holley Technicians
• Arrives Ready To Run

These carburetors that are intended for use with superchargers, and have a unique capability that allows their power Valves to reference the intake Manifold vacuum below the supercharger. This allows the power valve to operate as it should, based off intake manifold vacuum. A power valve provides further enrichment to the main metering system under load (low vacuum) conditions. Without this external referencing, the power valve would be reading the Supercharger boost pressure, which has no bearing on the engine load.

Product Features:

• Tumble Polished Shiny Finish For Good Looks
• Manual Choke For Precise Cold Start Control
• Dual Accelerator Pumps For Add Fuel Under Initial Acceleration
• Dual Feed Fuel Inlets For Constant High Volume Fuel Delivery
• Mechanical Secondaries For Perfect Off The Line Launches
• Lightweight Vehicles w/Auto Trans w/High Stall/Low Gearing
• Boost Power Valve For Proper Enrichment Under Acceleration
• 100% Wet Flow Tested By Holley Technicians
• Arrives Ready To Run

Holley Double Pumper(R) carburetors are a perfect performance upgrade for hot street cars and race vehicles. Double Pumper carburetors are an American icon when it comes to performance carburetors. From their roots as the premier carburetor on many factory muscle cars to powering thousands of vehicles across the finish line, the Double Pumper is a great choice whether you are burning up the street or the quarter mile.

Product Features:

• Metering Blocks Base Plate For Good Looks True Gasket Sealing
• Optimized Street/Strip Calibration That Works Out Of The Box
• Factory Preset Electric Choke For Easy Startups
• Mechanical Secondaries For Awesome Tire Turning Performance
• 4 Corner Idle Allows You To Precisely Control Your Idle System
• Clear Fuel Level Sight Glass No Mess Fuel Level Adjustments
• Aluminum Construction For A 43% Weight Savings
• Lightweight Vehicles w/Auto Trans w/High Stall/Low Gearing
• 100% Wet Flow Tested By Holley Technicians
• Arrives Ready To Run

Holley Double Pumper(R) carburetors are a perfect performance upgrade for hot street cars and race vehicles. Double Pumper carburetors are an American icon when it comes to performance carburetors. From their roots as the premier carburetor on many factory muscle cars to powering thousands of vehicles across the finish line, the Double Pumper is a great choice whether you are burning up the street or the quarter mile.

Product Features:

• Metering Blocks Base Plate For Good Looks True Gasket Sealing
• Optimized Street/Strip Calibration That Works Out Of The Box
• Factory Preset Electric Choke For Easy Startups
• Mechanical Secondaries For Awesome Tire Turning Performance
• 4 Corner Idle Allows You To Precisely Control Your Idle System
• Clear Fuel Level Sight Glass No Mess Fuel Level Adjustments
• Aluminum Construction For A 43% Weight Savings
• Lightweight Vehicles w/Auto Trans w/High Stall/Low Gearing
• 100% Wet Flow Tested By Holley Technicians
• Arrives Ready To Run

The Ultra Double Pumper Carburetors feature all aluminum construction and are equipped with metering blocks and a base plate made from 6061-T6 billet aluminum. Three different anodized color options (Red, Blue, or Black) allow for a personalized look while maintaining the ultra high strength and durability you get from billet. They weigh in at approximately 5 lbs less than a comparable zinc carburetor. The new Ultra Double Pumper Carburetors have an enhanced fuel curve for optimum performance, with many more features such as aluminum construction; anodized billet aluminum metering blocks and base plate; 4 corner idle for precise idle control; mechanical secondaries for great performance; clear fuel level sight plugs for easy, no mess fuel level adjustments; Ford automatic transmission kickdown for use on popular Ford transmissions; four vacuum ports for all necessary vacuum accessories; and for the first time on a Double Pumper, factory pre-set electric choke for easy, fast cold start-ups. The clean, polished look coupled with Red, Blue, or Black metering blocks and throttle body will certainly set your ride apart whether you are at the show or track. Dont trust your performance to just anyone, Holley is the only Modular carburetor company that has been in business for over 100 years and has powered every NASCAR champion since the 60s.

Product Features:

• Gold Dichromate Finish For Corrosion Resistance w/Classic Look
• Optimized Street/Strip Calibration That Works Out Of The Box
• Manual Choke For Precise Cold Start Control
• Mechanical Secondaries For Awesome Tire Turning Performance
• 4 Corner Idle Allows You To Precisely Control Your Idle System
• Dual Accelerator Pumps For Add. Fuel Under Initial Acceleration
• Dual Feed Fuel Inlets For Constant High Volume Fuel Delivery
• Lightweight Vehicles w/Auto Trans w/High Stall/Low Gearing

The Ultra Street Avenger carburetors feature all aluminum construction and are equipped with metering blocks and a base plate made from 6061-T6 billet aluminum. They weigh in at approximately 5 lbs less than a comparable zinc carburetor. The new Ultra Street Avenger carburetors have the same great features as their aluminum counterparts such as a tumble polished aluminum finish; quick change vacuum secondaries for easy tuning to optimize performance or fuel economy; four vacuum ports for all necessary vacuum accessories; factory preset electric choke for easy startups; built-in fuel filters; and an included fuel line kit so there are no unnecessary trips back to the parts store. Ultra Street Avengers feature the same optimized street calibration as the zinc versions so you know they will run great on your vehicle. In addition, the Ultra Street Avenger now comes with anodized metering blocks and a base plate made from 6061-T6 billet aluminum and a built in, clear fuel level sight glass for easy, no mess fuel level adjustments. Don’t trust your performance to just anyone, Holley is the only Modular carburetor company that has been in business for over 100 years and has powered every NASCAR champion since the 60’s.

Product Features:

• Ultra Street Avenger Has Optimized Calibration Works Out Of Box
• Factory Preset Electric Choke For Easy Startups
• Quick Change Vacuum Housing Cap To Tune For Performance/Fuel Econ
• 4 Corner Idle Allows You To Precisely Control Your Idle System
• Built In Clear Fuel Level Sight Glass For Fuel Level Adjustment
• Aluminum Construction For A 43% Weight Savings
• No Unnecessary Trips Back To The Parts Store
• Limited Lifetime Warranty
• 100% Wet Flow Tested By Holley Technicians
• Arrives Ready To Run

Holley Double Pumper(R) carburetors are a perfect performance upgrade for hot street cars and race vehicles. Double Pumper carburetors are an American icon when it comes to performance carburetors. From their roots as the premier carburetor on many factory muscle cars to powering thousands of vehicles across the finish line, the Double Pumper is a great choice whether you are burning up the street or the quarter mile.

Product Features:

• Metering Blocks Base Plate For Good Looks True Gasket Sealing
• Optimized Street/Strip Calibration That Works Out Of The Box
• Factory Preset Electric Choke For Easy Startups
• Mechanical Secondaries For Awesome Tire Turning Performance
• 4 Corner Idle Allows You To Precisely Control Your Idle System
• Clear Fuel Level Sight Glass No Mess Fuel Level Adjustments
• Aluminum Construction For A 43% Weight Savings
• Lightweight Vehicles w/Auto Trans w/High Stall/Low Gearing
• 100% Wet Flow Tested By Holley Technicians
• Arrives Ready To Run

Holley Double Pumper(R) carburetors are a perfect performance upgrade for hot street cars and race vehicles. Double Pumper carburetors are an American icon when it comes to performance carburetors. From their roots as the premier carburetor on many factory muscle cars to powering thousands of vehicles across the finish line, the Double Pumper is a great choice whether you are burning up the street or the quarter mile.

Product Features:

• Metering Blocks Base Plate For Good Looks True Gasket Sealing
• Optimized Street/Strip Calibration That Works Out Of The Box
• Factory Preset Electric Choke For Easy Startups
• Mechanical Secondaries For Awesome Tire Turning Performance
• 4 Corner Idle Allows You To Precisely Control Your Idle System
• Clear Fuel Level Sight Glass No Mess Fuel Level Adjustments
• Aluminum Construction For A 43% Weight Savings
• Lightweight Vehicles w/Auto Trans w/High Stall/Low Gearing
• 100% Wet Flow Tested By Holley Technicians
• Arrives Ready To Run

Holley Double Pumper(R) carburetors are a perfect performance upgrade for hot street cars and race vehicles. Double Pumper carburetors are an American icon when it comes to performance carburetors. From their roots as the premier carburetor on many factory muscle cars to powering thousands of vehicles across the finish line, the Double Pumper is a great choice whether you are burning up the street or the quarter mile.

Product Features:

• Metering Blocks Base Plate For Good Looks True Gasket Sealing
• Optimized Street/Strip Calibration That Works Out Of The Box
• Factory Preset Electric Choke For Easy Startups
• Mechanical Secondaries For Awesome Tire Turning Performance
• 4 Corner Idle Allows You To Precisely Control Your Idle System
• Clear Fuel Level Sight Glass No Mess Fuel Level Adjustments
• Aluminum Construction For A 43% Weight Savings
• Lightweight Vehicles w/Auto Trans w/High Stall/Low Gearing
• 100% Wet Flow Tested By Holley Technicians
• Arrives Ready To Run

Holley Double Pumper(R) carburetors are a perfect performance upgrade for hot street cars and race vehicles. Double Pumper carburetors are an American icon when it comes to performance carburetors. From their roots as the premier carburetor on many factory muscle cars to powering thousands of vehicles across the finish line, the Double Pumper is a great choice whether you are burning up the street or the quarter mile.

Product Features:

• Metering Blocks Base Plate For Good Looks True Gasket Sealing
• Optimized Street/Strip Calibration That Works Out Of The Box
• Factory Preset Electric Choke For Easy Startups
• Mechanical Secondaries For Awesome Tire Turning Performance
• 4 Corner Idle Allows You To Precisely Control Your Idle System
• Clear Fuel Level Sight Glass No Mess Fuel Level Adjustments
• Aluminum Construction For A 43% Weight Savings
• Lightweight Vehicles w/Auto Trans w/High Stall/Low Gearing
• 100% Wet Flow Tested By Holley Technicians
• Arrives Ready To Run

Holley Double Pumper(R) carburetors are a perfect performance upgrade for hot street cars and race vehicles. Double Pumper carburetors are an American icon when it comes to performance carburetors. From their roots as the premier carburetor on many factory muscle cars to powering thousands of vehicles across the finish line, the Double Pumper is a great choice whether you are burning up the street or the quarter mile.

Product Features:

• Metering Blocks Base Plate For Good Looks True Gasket Sealing
• Optimized Street/Strip Calibration That Works Out Of The Box
• Factory Preset Electric Choke For Easy Startups
• Mechanical Secondaries For Awesome Tire Turning Performance
• 4 Corner Idle Allows You To Precisely Control Your Idle System
• Clear Fuel Level Sight Glass No Mess Fuel Level Adjustments
• Aluminum Construction For A 43% Weight Savings
• Lightweight Vehicles w/Auto Trans w/High Stall/Low Gearing
• 100% Wet Flow Tested By Holley Technicians
• Arrives Ready To Run

The Ultra Double Pumper Carburetors feature all aluminum construction and are equipped with metering blocks and a base plate made from 6061-T6 billet aluminum. Three different anodized color options (Red, Blue, or Black) allow for a personalized look while maintaining the ultra high strength and durability you get from billet. They weigh in at approximately 5 lbs less than a comparable zinc carburetor. The new Ultra Double Pumper Carburetors have an enhanced fuel curve for optimum performance, with many more features such as aluminum construction; anodized billet aluminum metering blocks and base plate; 4 corner idle for precise idle control; mechanical secondaries for great performance; clear fuel level sight plugs for easy, no mess fuel level adjustments; Ford automatic transmission kickdown for use on popular Ford transmissions; four vacuum ports for all necessary vacuum accessories; and for the first time on a Double Pumper, factory pre-set electric choke for easy, fast cold start-ups. The clean, polished look coupled with Red, Blue, or Black metering blocks and throttle body will certainly set your ride apart whether you are at the show or track. Dont trust your performance to just anyone, Holley is the only Modular carburetor company that has been in business for over 100 years and has powered every NASCAR champion since the 60s.

Product Features:

• Gold Dichromate Finish For Corrosion Resistance w/Classic Look
• Optimized Street/Strip Calibration That Works Out Of The Box
• Manual Choke For Precise Cold Start Control
• Mechanical Secondaries For Awesome Tire Turning Performance
• Dual Accelerator Pumps For Add. Fuel Under Initial Acceleration
• Dual Feed Fuel Inlets For Constant High Volume Fuel Delivery
• Lightweight Vehicles w/Auto Trans w/High Stall/Low Gearing
• 100% Wet Flow Tested By Holley Technicians

4150 Race Carbs

MDL 4150 750CFM D/P-CHROMATE ELECT CHOKE