1942 Lincoln Custom Air Intakes

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

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

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 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

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

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 0-4412 is designed as a stock replacement for 2BBL street applications as well as being mandated for some oval track racing sanctioning bodies. Whether you are looking for a replacement carburetor to replace your tired and worn factory 2BBL or one to push you to the finish line on Saturday night, the Holley 0-4412 Performance 2BBL is the perfect choice.

Product Features:

• Vibratory Polished For Good Looks
• Man. Choke Cable Hand Controlled For Cold Start Control
• 50CC Accelerator Pump For Add. Fuel Under Initial Acceleration
• Power Valve Blow-Out Protection
• 100% Wet-Flow Tested To Assure It 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:

• Vibratory Polished For Good Looks
• Optimized Calibration For Outstanding Drivability
• Contoured Venturi Inlet Balances Airflow For Increased hp
• Screw In Air Bleeds For Precision Tuning Capabilities
• Four Corner Idle For Precise Idle 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
• Intended For Lightweight Vehicles w/Man/Auto Trans
• 100% Wet Flow Tested By Holley Technicians
• Arrives Ready To Run

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

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 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

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 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

Competition fuel curves provide safe and reliable horsepower for high performance race engines.

Product Features:

• Gold Dichromate Finish For Corrosion Resistance w/Classic Look
• Man. Choke Cable Hand Controlled For Cold Start Control
• 50CC Accelerator Pump For Add. Fuel Under Initial Acceleration
• Power Valve Blow-Out Protection
• 100% Wet-Flow Tested To Assure It 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

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 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

4150 ALUM DP 750 CFM ELECTRIC CHOKE

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 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

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 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

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

4150 Race Carbs

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

4150 Race Carbs

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

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