Holley Billet Fuel Pressure Regulators are part of a complete line of fuel system products from Holley. They are precision machined from 6061-T6 billet aluminium for strength and durability. They feature a black bright dip anodized body and a clear bright dip anodized top for corrosion resistance and good looks. The Holley 12-845 fuel pressure regulator features (1) -8 AN O-ring inlet, (1) -8 AN O-ring outlet, (1) -6 AN O-ring Return.
 
FEATURES:
 
(1) -8 AN O-ring inlet, (1) -8 AN O-ring outlet, (1) -6 AN O-ring return
Used in systems with a return line back to tank
Desighned for use with holley HP in-line fuel pumps or other high pressure pumps where return line is needed
Adjustable from 4.5-9 PSI for precise fuel pressure adjustments
Black bright dip anodized body and a clear bright dip anodized top
1/8"NPT gauge port

3/8" NPT ports
.220" (7/32") restriction
High Pressure (4-1/2-9 PSI)Includes mounting bracket
Chrome Finish

3/8" NPT ports
.220" (7/32") restriction
Low Pressure (1-4 PSI)
Includes mounting bracket
Chrome Finish

Dominator Billet Fuel Pressure Regulator EFI Bypass Style 40-70 PSI
 (1) -10 AN O-ring inlet, (1) -10 AN O-ring outlet, (1) -8 AN O-ring return
1/8" NPT gauge port
Used in systems with a return line back to tank
Designed for use with the Holley Dominator in-line fuel pumps or other high pressure pumps where return line is needed
Includes fitting for manifold reference
Adjustable from 40-70 PSI for precise fuel pressure adjustments
Mounting bracket included

Holley Billet Fuel Pressure Regulators are part of a complete line of fuel system products from Holley. They are precision machined from 6061-T6 billet aluminium for strength and durability. They feature a black bright dip anodized body and a clear bright dip anodized top for corrosion resistance and good looks. The Holley 12-840 fuel pressure regulator features 3/8" NPT in/out ports.

FEATURES:

• Adjustabl e from 4.5-9 psi for precise fuel pressure adjustments
• Constructe d of billet aluminium with a black anodized base and clear anodize top for good looks
• Used in systems where a return line is not needed
• Use with electric or mechanical pumps
• One 3/8" NPT inlet and two 3/8" NPT outlets
• 1/8" NPT gauge port
• Comparable and interchangeable with popular Holley® 12-803 regulator
• Mounting bracket included

Holley Transmission Kickdown Stud
Effective Mounting Point
For Transmission Kickdown
For Carburettor Hookup

Auminium Construction for added weight savings of 44% and a lasting shine
Weighs only 7.68 pounds
Features a tumble polished finish - can also be hand polished
Aluminium Sreet Avengers feature glass sight windows
Vacuum Secondaries for use on a wide variety of vehicles
Quick Change Secondary spring cap lets you choose the opening rate of the secondary barrels
Four vacuum ports
Factory pre-set "No Trouble" electric choke
Built-in inlet fuel filters
Fuel line kit included
No Trouble quick change vacuum secondaries
Dual feed fuel inlet
1 timed (spark) port, 2 full vacuum, and 1 PCV port
Ford A/T kickdown, does not work with A.O.D. transmissions
Intended for serious street enthusiasts. Calibrated for monter low-end torque, awesome acceleration, & unmatched top-end horsepower. Bolt on & go design
Electric choke
Optimised street calibration
Industry first Limited Lifetime Warranty
Comprehensive instruction manual
4 corner idle

Auminium Construction for added weight savings of 44% and a lasting shine
Weighs only 7.68 pounds
Features a tumble polished finish - can also be hand polished
Aluminium Sreet Avengers feature glass sight windows
Vacuum Secondaries for use on a wide variety of vehicles
Quick Change Secondary spring cap lets you choose the opening rate of the secondary barrels
Four vacuum ports
Built-in inlet fuel filters
Fuel line kit included
No Trouble quick change vacuum secondaries
Dual feed fuel inlet
1 timed (spark) port, 2 full vacuum, and 1 PCV port
Ford A/T kickdown, does not work with A.O.D. transmissions
Intended for serious street enthusiasts. Calibrated for monter low-end torque, awesome acceleration, & unmatched top-end horsepower. Bolt on & go design
Manual choke
Optimised street calibration
Industry first Limited Lifetime Warranty
Comprehensive instruction manual
4 corner idle

The Double Pumper is designed for use on lightweight vehicles with a manual transmission or an automatic transmission with a high stall and low rear end gears. The Double Pumper is now available in an aluminum construction and features dual accelerator pumps for additional fuel under initial acceleration; mechanical secondaries for great performance; dual feed fuel inlets for constant high volume fuel delivery and a manual choke for easy control of engine warm up.

Features:

• Aluminium Design for 38% weight savings
• Improved Fuel Bowl Design
• Tumble polished Shiny finish for good looks
• Optimized street/strip calibration that works out-of-the-box
• Manual choke (Cable driven, hand operated) for precise cold start control
• Mechanical secondaries for awesome tire turning performance
• Dual accelerator pumps for additional fuel under initial acceleration
• Dual feed fuel inlets for constant high volume fuel delivery
• Intended for lightweight vehicles w/ manual trans or automatics with high stall & low gearing
• 100% wet-flow tested by Holley technicians to assure it arrives ready to run!

Street Avenger carburetors are known to bolt on right out of the box. The 350 CFM Street Avenger carburetor has great features such as optimized street calibrations; two vacuum ports for all necessary vacuum accessories; factory preset electric choke for easy startups; built-in fuel filters; and an included 3/8� fuel line connection so there are no unnecessary trips back to the parts store.
The Avenger series are the first carburetors to have a limited lifetime warranty. With a great warranty like that and the included comprehensive instruction manual, you can count on years of worry free service.

Features:

• Vibratory polished for good looks
• Optimized street calibration that works-out-of-the-box
• Factory preset electric choke for easy startups (Range identified and restricted for easy no trouble adjustment)
• Built in No Trouble fuel inlet filter
• Street Avenger fuel metering system provides precise fuel control for great low end torque and awesome acceleration
• Compatible with GM, Chrysler, and Ford A/T kickdown linkage. Additional parts may be required.
• Gen IV No Trouble power valve
• Two vacuum ports (1 timed spark and 1 PCV)
• Limited lifetime warranty - Guaranteed to be free from defects in material and workmanship for the life of the product!
• 100% wet-flow tested by Holley technicians to assure it arrives ready to run!

Holley is proud to introduce the all new Aluminium Street HP. They utilize the best features from Holley's Race Bred 4150 HP carbs, but are tamed for street and light competition use. The Street HP features an aluminium contoured main body design taken from the race winning 4150 HP and has a tumble polished shiny finish and screw in air bleeds for precision tuning capabilities. The metering system includes a timed spark port for a vacuum advance distributor and is calibrated for a hot street/strip engine setup for outstanding throttle response, drivability and maximum performance. A street HP base plate is used so there are plenty of vacuum ports for power brakes, PCV, etc. 
The Aluminium Street HP takes all the great features from the race bred HP and the Double Pumper and combines them into the perfect street/strip carburetor.

Features:

• Aluminium construction for weight savings and long lasting good looks
• Optimized street/strip calibration for outstanding throttle response and drivability
• Contoured venturi inlet offers balanced airflow for increased horsepower
• Screw in air bleeds for precision tuning capabilities
• Four corner idle for precise idle control
• Vacuum secondaries for awesome tire turning performance
• Dual accelerator pumps for additional fuel under initial acceleration
• Dual feed fuel inlets for constant high volume fuel delivery
• Available in 650, 750, 850, and 950 CFM versions
• Intended for lightweight vehicles w/ manual trans or automatics with high stall & low gearing
• 100% wet-flow tested by Holley technicians to assure it arrives ready to run!
• Compatible with GM, Chrysler, and Ford A/T kickdown linkage. Additional parts may be required.

Holley is proud to introduce the all new Aluminium Street HP. They utilize the best features from Holley's Race Bred 4150 HP carbs, but are tamed for street and light competition use. The Street HP features an aluminium contoured main body design taken from the race winning 4150 HP and has a tumble polished shiny finish and screw in air bleeds for precision tuning capabilities. The metering system includes a timed spark port for a vacuum advance distributor and is calibrated for a hot street/strip engine setup for outstanding throttle response, drivability and maximum performance. A street HP base plate is used so there are plenty of vacuum ports for power brakes, PCV, etc. 
The Aluminium Street HP takes all the great features from the race bred HP and the Double Pumper and combines them into the perfect street/strip carburetor.

Features:

• Aluminium construction for weight savings and long lasting good looks
• Optimized street/strip calibration for outstanding throttle response and drivability
• Contoured venturi inlet offers balanced airflow for increased horsepower
• 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 additional fuel under initial acceleration
• Dual feed fuel inlets for constant high volume fuel delivery
• Available in 650, 750, 850, and 950 CFM versions
• Intended for lightweight vehicles w/ manual trans or automatics with high stall & low gearing
• 100% wet-flow tested by Holley technicians to assure it arrives ready to run!
• Compatible with GM, Chrysler, and Ford A/T kickdown linkage. Additional parts may be required.

Holley is proud to introduce the all new Aluminium Street HP. They utilize the best features from Holley's Race Bred 4150 HP carbs, but are tamed for street and light competition use. The Street HP features an aluminium contoured main body design taken from the race winning 4150 HP and has a tumble polished shiny finish and screw in air bleeds for precision tuning capabilities. The metering system includes a timed spark port for a vacuum advance distributor and is calibrated for a hot street/strip engine setup for outstanding throttle response, drivability and maximum performance. A street HP base plate is used so there are plenty of vacuum ports for power brakes, PCV, etc. 
The Aluminium Street HP takes all the great features from the race bred HP and the Double Pumper and combines them into the perfect street/strip carburetor.

Features:

• Aluminium construction for weight savings and long lasting good looks
• Optimized street/strip calibration for outstanding throttle response and drivability
• Contoured venturi inlet offers balanced airflow for increased horsepower
• 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 additional fuel under initial acceleration
• Dual feed fuel inlets for constant high volume fuel delivery
• Available in 650, 750, 850, and 950 CFM versions
• Intended for lightweight vehicles w/ manual trans or automatics with high stall & low gearing
• 100% wet-flow tested by Holley technicians to assure it arrives ready to run!
• Compatible with GM, Chrysler, and Ford A/T kickdown linkage. Additional parts may be required.

Holley Regulator Diaphragm Repair Kit Replacement Diaphragm Repair Kit Suit Holley 12-803 and 12-804 Regulators

Main Jet Extension (2pk)
An improved jet extension design that actually screws into the metering block. The main metering jet then threads into the end of the extension. The installation effectively moves the fuel entry point for the main jet out into the fuel bowl. In this location it cannot be uncovered by fuel, causing a lean condition, during periods of hard acceleration or braking. 2/Pkg.

Standard Main Jet, 1/4-32 Thread, .056" Jet Size (2pk)
These metering orifices control fuel flow into the metering system. They are rated in flow capacity "cubic centimetres per minute" and are changeable for tuning purposes. The shape of the entry, exit, and size determines flow. All Holley Main Jets are flow tested and then stamped with the correct number.
Standard Main Jet
.056" Jet size
1/4-32 Thread
Sizes from 40-110
Fits All Holley Model 2010, 2300, 4010, 4011, 4150, 4160 & 4500

Standard Main Jet, 1/4-32 Thread, .089" Jet Size (2pk)
These metering orifices control fuel flow into the metering system. They are rated in flow capacity "cubic centimetres per minute" and are changeable for tuning purposes. The shape of the entry, exit, and size determines flow. All Holley Main Jets are flow tested and then stamped with the correct number. NOT FOR USE WITH CARBURETTORS ORIGINALLY DESIGNED FOR ALCOHOL.
Standard Main Jet
.089" Jet size
1/4-32 Thread
Sizes from 40-110
Fits All Holley Model 2010, 2300, 4010, 4011, 4150, 4160 & 4500

Single-Stage Power Valve STD Flow 2.5" Hg, Including Gasket

Holley Accelerator Pump Diaphragm 50cc, Rubber, Petrol only, Suit Holley, Barry Grant, Demon
Not recommended for alcohol based fuels.

Holley Carburettor Fast Kit/Rebuild Kit Fits Model Number 4160
Serves All Holley Perf. Carburettors
Genuine Holley Quality Parts
Extra Parts For Perf. Tuning
Step-By-Step Instructions
Detailed Tuning Guide
Packaging Also Parts Tray
Competitively Priced

Holley Carburettor Fast Kit/Rebuild Kit Fits Model Number 4150HP
Serves All Holley Perf. Carburettors
Genuine Holley Quality Parts
Extra Parts For Perf. Tuning
Step-By-Step Instructions
Detailed Tuning Guide
Packaging Also Parts Tray
Competitively Priced

Holley Adjustable Inlet Needle & Seat - Viton Size 0.110"
Most Holley performance carburettors come equipped with a Viton-tipped needle. The Viton needle design is resistant to dirt and conforms nicely to the shape of the seat for superior sealing. For this reason it is not recommended to use a steel or titanium needle, except for racing.

Fuel Bowl Gaskets Suit 3 Circuit 4500 Dominators, Blue, Pair

Metering Block Gaskets Suit 4500 Dominator 3 circuit, Blue non stick, 2/pkg

Fuel Bowl Gasket Fits 2300, 4150/4160, 4500 Two Circuit Carburettors, Blue non stick, 10/pkg

Base Gasket Base Gasket 1-13/16" Bore Size. 1/16" Thickness Fits Holley 4160/4150 Series

Throttle Body Gasket 1.75" Models 4150/4160

Metering Block Gasket For Models 2300, 4150/4160, 4500 without Intermediate Circuit, Blue non stick

Blue Non-Stick Fuel Bowl Gasket For Models 4165, 4175, 2/pkg

Fuel Transfer Tube O-Ring For New Style Transfer Tube