1983 Mazda RX-7 Carburetors

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
• 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 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

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

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

By popular demand, Holley is expanding the draw-thru supercharger carburetor line to now include the XP series. Like the existing HP line, these are available in 600, 750, and 950 CFM flow rates and standard polished with black accents. The feature-laden XP includes a contoured venturi inlet for balanced air flow, screw in air bleeds for precision tuning capabilities, high flow billet metering blocks, billet base plate, and Dominator style fuel bowls which allow plumbing from either side.

Product Features:

• Tumble polished shiny finish for good looks
• Big block Chevrolet 2×4, 871 & 1071 blower calibration
• Contoured venturri inlet offers balanced airflow for increased horsepower
• Screw in air bleeds for precision tuning capabilities
• Dual 30cc accelerator pumps for additional fuel under initial acceleration
• Dual feed fuel inlets for constant high volume fuel delivery
• 4 corner idle allows you to precisely control your idle system
• Mechanical Secondaries for perfect off the line launches
• Boost referenced power valve for proper enrichment under acceleration
• Throttle lever cut off for clearance on a sideways application
• 100% wet-flow tested by Holley technicians to assure it 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

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

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