Technical Request

Welcome to the Technical Services E-mail System. To provide you with the most accurate and timely answers to your technical questions, please fill out the technical information section below. Please fill out the form as completly as possible. This will allow the techs to properly answer your questions without any delay.

For any carburetor questions, you must provide the list number of the carb off the air horn or body. Instruction sheets for many products can be downloaded free, and the Tech Service Library contains a wealth of information. Please keep in mind that some questions may better be answered over the phone. Please direct these to our Tech Service phone lines at:

Holley Performance:
Local 270-781-9741 between 8 am and 5:30 pm CST Monday - Friday, and between 8 am and 2pm CST on Saturday.

Please allow up to two business days for an answer, and thank you for your business!

Your Contact Information

Name [Required]

Email [Required]

Daytime Phone

Product Information

Type [Required]

SELECT Accel Accessories Atomic EFI Coil Distributor DynaForce Earls Performance Plumbing FlowTech Exhaust Hays Holley Carbs and Manifolds Holley Fuel Injection Holley Fuel Pump Hooker Headers Automotive Ignition Lakewood/QuickTime Mallory Marine Mr. Gasket NOS Pro-Mag QFT Carbs QFT Fuel Injection QFT Fuel Pumps RacePak Remanufactured Parts Spark Plug Wires SysteMax Weiand Super Chargers Other

Part Number

Description [Required]

Purchase Date

Your Vehicle

Model Year [Required]

* select 20202019201820172016201520142013201220112010200920082007200620052004200320022001200019991998199719961995199419931992199119901989198819871986198519841983198219811980197919781977197619751974197319721971197019691968196719661965196419631962196119601959195819571956195519541953195219511950194919481947194619451944194319421941194019391938193719361935193419331932193119301929192819271926192519241923192219211920191919181917191619151914191319121911191019091908190719061905190419031902190119001899189818971896

Make [Required]

Model [Required]

Intended Use

Type [Required]

Street Car Street/Strip Drag Car Circle Track Dirt Track Pick-Up SUV Jet Ski Boat Street Bike Dirt Bike Race Bike Recreational Vehicle Other

DriveType [Required]

2 Wheel Drive 4 Wheel Drive Other

Vehicle Weight

Transmission Type

Tire Size

Your Engine

Engine Brand [Required]

Select one Acura Alfa Romeo AMC Aston Martin Audi Austin Austin Healey BMW Bentley Buick Cadillac Chevrolet Chrysler Citroën Cord Daewoo Datsun DeLorean DeSoto Dodge Ducati Eagle Edsel Ferrari Fiat Ford Geo GMC Harley Davidson Honda Honda Motorcycle Hummer (AM General) Hyundai Infiniti International Harvester Indian Isuzu Jaguar Jeep Kawasaki Kia Lamborghini Lancia Land Rover Lexus Lincoln Lotus Maserati Mazda Mercedes-Benz Mercury MG Mini Mitsubishi Nash Nissan Oldsmobile Opel Packard Peugeot Plymouth Polaris Pontiac Porsche Renault Rolls-Royce Saab Saturn Shelby Cobra Studebaker Subaru Suzuki Toyota Triumph Volkswagen Volvo Willys Yamaha Other

Engine Size [Required]

RPM Range [Required]

Vacuum at Idle

Camshaft Type

Don't Know Stock Hydraulic Flat-Tappet Hydraulic Roller Solid Flat-Tappet Solid Roller

Cam Specs at

Adv .050 Lift

Lobe Sep

Int Duration

Int Lift

Exh Duration

Exh Lift

Rocker Type

Don't Know Stock Roller Tip Full Roller Shaft

Rocker Ratio

Carb Type

Carb List Number

Fuel Injection Brand

Fuel Injection Type

Intake Manifold

Compression Ratio

Header Type

Header Tube Size

Cylinder Head Type

Supercharger Type

Supercharger Pulley Sizes

Turbocharger Type

PSI of Boost

NOS Type

NOS Shot

Estimate Horsepower

Converter Stall

Rear End Ratio

Desired level of performance

Your Question or Problem

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