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  • Holley 97-151 LS Idler Tensioner Assembly with Grooved Pulley
    Holley 97-151 LS Idler Tensioner Assembly with Grooved Pulley
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    These LS engine style tensioner assemblies are for use with all Holley passenger side LS accessory drive brackets (includes 68 mm grooved pulley).  They are manufactured from quality material matched with OE specs to effectively keep proper belt tension and prevent belt slippage when using a mechanical fan.

    • Designed for use with Holley accessory drive brackets (42520133)
    • Grooved pulley
    • For LS engines
  • Holley 0-80805HB Ultra HP Gas 950 CFM 4 Barrel Carburetor
    Holley 0-80805HB Ultra HP Gas 950 CFM 4 Barrel Carburetor
    x
                

    Holley HP™ four barrel Carburetors have been the standard in racing four barrel carburetors for nearly two decades. So how do you make them better? You make them 38% lighter, increase the fuel capacity by 20% and add 30 other new features! They're available in an all–new Hard Core Gray™ hard coat anodized finish with Black™ billet for superior corrosion protection.

    New Features! (LINK)

    Note: Fuel inlets are spaced 9.75" on center which will require a lengthened fuel line / fuel log arrangement. Fuel bowl inlets feature -8 AN O-ring port fittings to allow for a large variety of plumbing options. Fuel bowl can be plumbed from either side.

    Holley 950 CFM 4 Barrel Carburetor Installation Instructions (PDF)

  • Holley 0-4412CT Circle Track 500 CFM 2 Barrel Carburetor
    Holley 0-4412CT Circle Track 500 CFM 2 Barrel Carburetor
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                This 500cfm 4412CT Holly carb shares the hugely  successful features of the original 4412C but with a couple changes  aimed for circle track cars. The choke has been removed but the horn  remains and has been specially calibrated for circle track use. The  4412C Holley carb is easily the most winningest two barrel carburetor on the market  and comes out of the box ready to run. 

    Features:
    • Choke delete
    • Choke horn remains
    • 50cc accelerator pump
    • 1 timed (spark) port, 1 full vacuum, & 1 PCV port
    • The mandated carbs for many oval track racing sanctioning bodies
    • Calibrated specifically for circle track use
  • Holley 242-1 B/B Chevy Replica LS Coil Covers
    Holley 242-1 B/B Chevy Replica LS Coil Covers
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    Do you own a vehicle with an LS based engine, but love the looks of a big–block Chevy? These coil covers from Holley are equally at home on a 2010 Camaro or a LS swap muscle car, truck or any ride needing to cover the factory LS coils. They're ready to paint so use your imagination! The covers are easily installed by using basic hand tools. Just replace a few coil bracket mount bolts with the included ball studs and snap the covers in place.

    • Cover those unsightly coil packs on your GM LS engine
    • Ultra lightweight glass-filled nylon composite construction
    • Paint to match your color scheme
    • Trim to fit your application
    • OEM-style snap-on mounting
    • Oil fill adaptor and cap included
    • Fits LS2, LS3 & LS7 engines as well as other LS family engines using LS3 style coils & valve covers

    Note: Coil cover may require minor trimming on typical hot rod or swap application. Use on OE applications may require more extensive trimming to clear factory componentry (A/C box, brake booster, front drive accessories etc.).

    425-2421 Instructions (PDF)

  • Holley 0-80803HB Ultra HP Gas 750 CFM 4 Barrel Carburetor
    Holley 0-80803HB Ultra HP Gas 750 CFM 4 Barrel Carburetor
    x
                

    Holley HP™ Carburetors have been the standard in racing four barrel carburetors for nearly two decades. So how do you make them better? You make them 38% lighter, increase the fuel capacity by 20% and add 30 other new features! They're available in an all–new Hard Core Gray™ hard coat anodized finish with Black™ billet for superior corrosion protection.

    New Features! (LINK)

    Note: Fuel inlets are spaced 9.75" on center which will require a lengthened fuel line / fuel log arrangement. Fuel bowl inlets feature -8 AN O-ring port fittings to allow for a large variety of plumbing options. Fuel bowl can be plumbed from either side.

    Holley 750 CFM 4 Barrel Carburetor Installation Instructions (PDF)

  • Holley 37-754 Model 4160 4 Barrel, 750 CFM Rebuild Kit
    Holley 37-754 Model 4160 4 Barrel, 750 CFM Rebuild Kit
    x
                

    Each Holley Renew Kit carburetor rebuild kit contains all parts and gaskets that are necessary to restore “like new” performance to your four barrel carburetor. Detailed instructions are also included to guide you through the rebuilding process. Start off the season with a quality Holley Renew Kit repair kit. It's your guarantee for trouble–free cruising. 

    • Gaskets
    • O-Rings
    • Pump Diaphragm
    • Needle & Seat
    • Power Valve 
    • Step-By-Step Instructions
    • Detailed Tuning Guide
    427-37754 Instructions (PDF)
  • Holley 26-25 Banjo Swivel Fitting for 5/16 Hose, 9/16-24
    Holley 26-25 Banjo Swivel Fitting for 5/16 Hose, 9/16-24
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    Fuel inlet banjo fitting for use with 5/16" hose. Has 9/16"-24 threads.

  • Holley 0-80801HB Ultra HP Gas 600 CFM 4 Barrel Carburetor
    Holley 0-80801HB Ultra HP Gas 600 CFM 4 Barrel Carburetor
    x
                

    Holley HP™ Carburetors have been the standard in racing four barrel carburetors for nearly two decades. So how do you make them better? You make them 38% lighter, increase the fuel capacity by 20% and add 30 other new features! They're available in an all–new Hard Core Gray™ hard coat anodized finish with Black™ billet for superior corrosion protection.

    New Features! (LINK)

    Note: Fuel inlets are spaced 9.75" on center which will require a lengthened fuel line / fuel log arrangement. Fuel bowl inlets feature -8 AN O-ring port fittings to allow for a large variety of plumbing options. Fuel bowl can be plumbed from either side.

    Holley 600 CFM 4 Barrel Carburetor Installation Instructions (PDF)

  • Holley 0-80457S 4160 600 CFM 4 Barrel Carburetor, Electric Choke
    Holley 0-80457S 4160 600 CFM 4 Barrel Carburetor, Electric Choke
    x
                

    Holley's Model 4160 4-barrel carburetors are designed for budget minded enthusiasts and are calibrated for use on stock to mildly modified engines. These classic Holley four barrel carbs feature all metal parts and vacuum secondaries. They have a universal throttle lever and power valve blow-out protection.

    • Vacuum secondaries allow use on wide variety of vehicles
    • Electric choke
    • Single feed fuel inlet
    • Side hung float bowls
    • Power Valve Blow-Out Protection
    • Calibrated for excellent street performance
    • Ford A/T kickdown, does not work with A.O.D. transmissions
    • 1 timed (spark) port, 1 full vacuum, and 1 PCV port
    • Performance upgrade for stock to mildly modified vehicles
    • Universal calibration for easy bolt-on performance
    • “Next Gen” needle & seat design eliminates the need for external float level adjustment

    Holley 600 CFM 4 Barrel Carburetor Installation Instructions (PDF)

  • Holley 12-802-1 110 GPH Blue Electric Fuel Pump with Regulator
    Holley 12-802-1 110 GPH Blue Electric Fuel Pump with Regulator
    x
                Please view the product's page for more information
            
  • Holley 34-505 Chrome Accelerator Pump Cover, 50cc
    Holley 34-505 Chrome Accelerator Pump Cover, 50cc
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    Chrome plated accelerator pump covers for Holley carburetors with 50cc accelerator pumps.

  • Holley 116-1 Side Hung Carburetor Float
    Holley 116-1 Side Hung Carburetor Float
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                These Holley replacement Nitrophyl carburetor floats are for side hung float bowls.
            
  • Holley Power Valve
    From: $9.99
    Product Rating: 5.00 Stars
    Holley Power Valve
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                Standard flow. Available sizes include: 2.5, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5, 9.5 and 10.5 in hg. 

    High flow (big window valve) for alcohol. Available sizes include: 2.5, 3.5, 4.5, 5.5, 6.5, 8.5, 10.5 in hg.

  • Holley 21-2 LS Accessory Drive Bracket Installation Kit, Middle Align
    Holley 21-2 LS Accessory Drive Bracket Installation Kit, Middle Align
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                Please view the product's page for more information
            
  • Holley 12-289-11 S/B Ford Racing Pro Mechanical Fuel Pump, 110 GHP
    Holley 12-289-11 S/B Ford Racing Pro Mechanical Fuel Pump, 110 GHP
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                 Competition 110 GPH, 6 1/2 -8 PSI.  Gasoline Only.
    Features:
    • High output performance.
    • Heavy Duty construction for continuous high RPM performance.
    • Six high flow valves ensure adequate and continuous fuel flow.
    • Repair kits are readily available to replace critical components.
    • Chevrolet pump features an extra beefy rocker arm casting to help withstand severe race usage.
    • 3/8" NPT Inlet/Outlet
  • Holley 20-131 R4 Compressor LS Accessory Drive AC, PS, Alt Bracket Kit
    Holley 20-131 R4 Compressor LS Accessory Drive AC, PS, Alt Bracket Kit
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    These accessory drive brackets from Holley are great when swapping a GM LS engine into a muscle car, truck, hot rod or other vehicle. These brackets were designed to deliver a factory style appearance, correct belt alignment, and factory stability.  Holley's kits supply the required brackets and hardware needed for installation.

    To determine correct application, these three easy steps will help get you going:

    • Step one is to determine your belt alignment based on your crank Pulley position on the engine you have.
    • Step two is to choose the Holley accessory drive brackets that you need (A/C, Alt & P/S or both).
    • Step three is to see which Holley installation kit your set–up requires to line up your accessories with your crank Pulley position. An application specific installation kit (part # 425211, 425212, or 425213) is REQUIRED for most applications.

    Note: When referring to guide links below, keep in mind that part numbers shown are MFG numbers without "425" prefix.

    Fitment and Required Components Guide for 20-131 Bracket Kit (PDF)  

    Assembly Instructions for Holley 20-131 Accessory Drive Kit (PDF)   

  • Holley 45-224 4150 Electric Choke Conversion Kits
    Holley 45-224 4150 Electric Choke Conversion Kits
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    These kits can be used to convert Holley carburetors which originally came equipped with manually–operated choke or automatic/electric operated choke. 

    Fits carburetor's with "external" vacuum source (Model 0-4412, 0-4776-2, 0-4777-2, 0-4778-2, 0-4779-2, 0-4780-2, 0-4781- 2, 0-6299, 0-6708 and 0-6709).

    427-45224 Instructions (PDF)

  • Holley 135-5 30cc Accelerator Pump Diaphragm
    Holley 135-5 30cc Accelerator Pump Diaphragm
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                Holley accelerator pump diaphragms are available in 30cc (427-1355) or 50cc (427-1357) sizes. For use with gasoline only.
            
  • Holley 0-86670HB Ultra Street Avenger 670 CFM 4 Barrel Carburetor
    Holley 0-86670HB Ultra Street Avenger 670 CFM 4 Barrel Carburetor
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    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 quick change vacuum secondaries for easy tuning to optimize performance or fuel economy; four vacuum ports for all necessary vacuum accessories; factory preset “No trouble” electric choke for easy start ups; built–in fuel filters; and an included fuel line kit so there are no unnecessary trips back to the parts store. This four barrel carb features 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.

    The clean, Hard Core Gray™ w/ black anodized billet aluminum metering blocks and base plate will certainly set your ride apart whether you are at the show or track.

    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.

  • Holley 0-9776 4160 Dual Quad 450 CFM 4 Barrel Carburetor
    Holley 0-9776 4160 Dual Quad 450 CFM 4 Barrel Carburetor
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    The Holley Model 4160 450 CFM four barrel carburetor is great for use on tunnel rams. It has mechanical secondaries and is designed for use on inline dual 4 barrel applications or small displacement Ford applications. Linkage is not compatible with GM or Chrysler Automatic Transmissions.

    • Mechanical secondaries
    • No choke
    • Side hung float bowls
    • For dual quad or tunnel ram applications

    Holley 4 Barrel Carb Installation Instructions (PDF)

  • Holley Float for Primary Bowl
    $23.99
    $34.99
    Holley Float for Primary Bowl
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    Made specially for the circle track carb. The fuel rides up the wedge and does not shut the fuel off sooner than it should.

    Note: Float should work on any Holley model except the 4160 with brass center hung floats.

  • Holley Retro T-Shirt
    From: $15.99
    Holley Retro T-Shirt
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                Show the world that you care about hot rodding heritage with a retro-style t-shirt from Holley. Available in sizes L-XXL.
            
  • Holley 37-119 Model 4160 4 Barrel, 600 CFM Carb Rebuild Kit
    Holley 37-119 Model 4160 4 Barrel, 600 CFM Carb Rebuild Kit
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    Each Holley Renew Kit carburetor rebuild kit contains all parts and gaskets that are necessary to restore “like new” performance to your four barrel carburetor. Detailed instructions are also included to guide you through the rebuilding process. Start off the season with a quality Holley Renew Kit repair kit. It's your guarantee for trouble–free cruising.

    For Holley 600 CFM electric choke, side hung float bowl.

    • Gaskets
    • O-Rings
    • Pump Diaphragm
    • Needle & Seat
    • Power Valve 
    • Step-By-Step Instructions
    • Detailed Tuning Guide
    427-37119 Instructions (PDF)
  • Holley 36-181 Main Jet Assortment
    $54.99
    $69.99
    Product Rating: 5.00 Stars
    Holley 36-181 Main Jet Assortment
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    Includes two each of all Holley jets from sizes #64 - #99. A total of 36 different sizes are provided in a convenient plastic storage box.

    Speedway carries jet sizes from #46 - #100 individually for all your performance needs.

  • Holley 0-80528-1 HP Series 750 CFM Gas 4 Barrel Carburetor
    Holley 0-80528-1 HP Series 750 CFM Gas 4 Barrel Carburetor
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    Holley's HP Series four barrel carburetors set the standard in oval track race carbs. These performance calibrated gasoline four barrel carbs are race ready, right out of the box. The Model 4150 HP 4 barrel carb is packed with premium features like contoured air entries, high strength castings, and stainless throttle plates, all of which will provide you with a definite advantage at the track.

    • Calibrated for gasoline
    • Dichromate finish
    • Contoured Venturi entry angles and symmetrical venturi bores
    • Screw-in air bleeds for precision tuning
    • High flow metering blocks
    • Viton® Non-stick gaskets
    • Lightweight slotted misture screws for tuning stability
    • Four corner idle system
    • Stainless steel throttle plates
    • Button head throttle plate screws for superior airflow
    • Center hung Dominator style fuel bowls
    • Spun-in down leg style boosters
    • High strength sealing surfaces
    • Power valve blow-out protection
    • 100% wet flow tested and calibrated
    • Progressive mechanical secondaries
    • Double 30cc accelerator pumps
    • Venturii size: 1.376"
    • Throttle bore: 1.687"

    Holley 750 4 Barrel Carb Installation Instructions (PDF)

  • Holley 12-801-1 97 GPH Red Electric Fuel Pump
    Holley 12-801-1 97 GPH Red Electric Fuel Pump
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    Holley's Red Electric fuel pump is a standard pressure street pump for gas only.  It has a pressure preset of 7 psi and a free flow capacity of 97 gph. It flows 67 gph while maintaining 5 psi. No regulator required. Has a 3/8" NPT inlet and outlet.

    • Tumble polished billet look
    • Improved design for street/strip applications
    • Distinctive "Red" logo
    • Flows 97 GPH (free flow)
    • Flows 71 GPH at 4 PSI
    • Regulator is not required
    • Motor draws only 2 amps current
    • 7-1/2 Amp fuse recommended
    • Provides constant fuel flow with no pulsation
    • Has externally accessible pressure relief valve (max 7 PSI)
    • Rotor/Vane pump design is more tolerant of contaminated fuels
    • New lower housing casting for enhanced fuel flow and quieter operation
    • Weighs only 2.88 lbs.
    • Includes mounting bracket
    • Repair kits are readily available
    • NOT compatible with alcohol or methanol fuels
    • Use of safety shut-off switch strongly recommended
    • Not designed or recommended for use with fuel injection systems
    • 3/8 NPT inlet/outlet

    425-12801 Instruction Sheet (PDF)

    Fuel Pump Tech Info (PDF) 

  • Holley 12-833 1962-1974 Small Block Ford Street Fuel Pump
    Holley 12-833 1962-1974 Small Block Ford Street Fuel Pump
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    These all-new (not rebuilt) mechanical fuel pumps from Holley have a 7-1/2 psi shut-off pressure and deliver 80 GPH. The adjustable lower housing permits fuel ports (1/4" NPT) to be rotated for best fuel line access. Pump fittings not included (sold separately). These pumps have a flash chrome finsih that is not show quality.

    • High Output Fuel Flow
    • Flows 80 GPH Free Flow
    • Shutoff Pressure Preset at 7.5 PSI
    • Fuel Pressure Regulator is Not Required
    • Heavy Duty Construction For Continuous High RPM Operation
    • Fuel Body Casting Can Be Rotated to Accommodate Various Plumbing Situations
    • Inlet & Outlet Tapped For 1/4" NPT

    Holley Pump Tech Info (PDF)

  • Holley 20-12 Accelrator Pump Cams
    Holley 20-12 Accelrator Pump Cams
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    Includes eight assorted pump cams to fine-tune your accelerator pump shot. Accelerator pump shot relative to cam color from lightest to heaviest are as follows: White, Blue, Red, Orange, Black, Green, Pink & Brown.

    • Tailor Accelerator Pump Performance
    • Each Cam Is Different Shape/Profile
    • Gives Different Results
  • Holley 12-807 Fuel Pressure Regulator Diaphragm Repair Kit
    Holley 12-807 Fuel Pressure Regulator Diaphragm Repair Kit
    x
                  

    These genuine Holley diaphragm repair kits will allow you to restore the performance of your high-mileage fuel pressure regulator. With these repair kits, you'll regain the accuracy and performance of the regulator from when it was new.

    This diaphragm repair kit is for 12-803 and 12-804 regulators.

    MFG. Part #: 12-807

  • Holley 0-4777C 4150 Double Pumper 650 CFM 4 Barrel Carb, Manual Choke
    Holley 0-4777C 4150 Double Pumper 650 CFM 4 Barrel Carb, Manual Choke
    x
                

    Top off your your engine with an American icon - the Holley Model 4150 Double Pumper. As a staple on hot street cars and race vehicles, this four barrel carburetors dual accelerator pumps provide additional fuel under initial acceleration for awesome tire-turning performance in lighweight vehicles and vehicles with manual transmissions or low gearing. Plus, with mechanical secondaries, your foot directly controls the opening of the secondary throttle blades.

    With features like dual metering blocks, center hung floats, 4-corner idle, and dual fuel inlets, it's no wonder why Holley is #1 in performance fuel delivery.

    • Mechanical secondaries
    • Dual accelerator pumps
    • Manual choke
    • Two corner idle
    • Dual feed fuel inlet
    • Center hung floats
    • 1 timed (spark) port, 1 full vacuum, and 1 PCV port
    • Intended for lightweight vehicles w/ manual trans or automatics with high stall & low gearing

    Holley 650 CFM 4 Barrel Carburetor Installation Instructions (PDF)

  • Holley 34-26 Quick Change Secondary Float Bowl
    Holley 34-26 Quick Change Secondary Float Bowl
    x
                Quick change float bowl for secondary side of 4150/4160 carbs for center hung floats only.

    NOTE: Primary and secondary bowls are not interchangeable!

    425-3426 Instruction Sheet (PDF)

  • Holley 135-10 30cc Accelerator Pump Diaphragm, Alcohol
    Holley 135-10 30cc Accelerator Pump Diaphragm, Alcohol
    x
                Holley GLFT 30cc accelerator pump diaphragm for use with all alcohol base fuels.
            
  • Holley Chrome Fast Idle Cam Plate
    Holley Chrome Fast Idle Cam Plate
    x
                

    Holley offers quality choke service parts for your carburetor.  These fast idle cam plates come in a beautiful chrome finish.

    • Fast idle cam plate
    • Chrome
  • Holley 10003HOL Retro Metal Sign
    $19.99
    $29.99
    Holley 10003HOL Retro Metal Sign
    x
                Holley retro metal sign. 18" x 18"
            
  • Street Demon 1905 750 CFM Hand-Polished Aluminum Carburetor
    Street Demon 1905 750 CFM Hand-Polished Aluminum Carburetor
    x
                Please view the product's page for more information
            
  • Holley 37-1541 Performance Carburetor Renew Rebuild Kit
    Holley 37-1541 Performance Carburetor Renew Rebuild Kit
    x
                

    Each Holley Renew Kit carburetor rebuild kit contains all parts and gaskets that are necessary to restore “like new” performance to your four barrel carburetor. Detailed instructions are also included to guide you through the rebuilding process. Start off the season with a quality Holley Renew Kit repair kit. It's your guarantee for trouble–free cruising.

    • Serves all Holley Performance Carburetors
    • Genuine Holley quality parts
    • Extra parts for performance tuning
    • Step-by-step instructions
    • Detailed tuning guide
    • Packaging also parts tray
    • Includes:
      • Gaskets
      • O-Rings
      • Pump Diaphragm
      • Needle & Seat
      • Power Valve 
      • Step-By-Step Instructions
      • Detailed Tuning Guide

    427371541 Carb Rebuild Manual (PDF)

    427371541 Carb Exploded View (PDF) 

    427371541 Carb Kit Specifications (PDF) 

  • Holley 20-134 LS Accessory Drive Bracket, Passenger Side A/C
    Holley 20-134 LS Accessory Drive Bracket, Passenger Side A/C
    x
                Please view the product's page for more information
            
  • Holley 37-1543 2300 2 Barrel Carburetor Rebuild Fast Kit
    Holley 37-1543 2300 2 Barrel Carburetor Rebuild Fast Kit
    x
                

    These kits are ideal for a quick refresher of your two barrel Holley carb. Each kit includes step-by-step instructions and a detailed tuning guide.

    Kit includes one 30cc and one 50cc accelerator pump (black material for gas) and one 6.5 power valve.

    427-371543 Instructions (PDF)

  • Holley 0-1850SA 4160 Aluminum 600 CFM 4 Barrel Carburetor, Manual Choke
    Holley 0-1850SA 4160 Aluminum 600 CFM 4 Barrel Carburetor, Manual Choke
    x
                

    Holley's new Model 4160 600 CFM aluminum street four barrel carburetor is constructed from aluminum, which compared to its zinc counterpart equates to a weight savings of over 5 lbs. This Holly carburetors new aluminum will hold its shine and can also be hand polished for a custom look.

    • Vacuum secondaries allow use on wide variety of vehicles
    • Manual choke
    • Single feed fuel inlet
    • Calibrated for excellent street performance
    • Ford A/T kickdown, does not work with A.O.D. transmissions
    • 1 timed (spark) port, 1 full vacuum, and 1 PCV port
    • Performance upgrade for stock to mildly modified vehicles
    • Universal calibration for easy bolt-on performance

    Holley 600 CFM 4 Barrel Carburetor Installation Instructions (PDF)

  • Holley 20-135 Drivers Side P/S & Alternator LS Acc Drive Bracket Kit
    Holley 20-135 Drivers Side P/S & Alternator LS Acc Drive Bracket Kit
    x
                

    These accessory drive brackets from Holley are great when swapping a GM LS engine into a muscle car, truck, hot rod or other vehicle. These brackets were designed to deliver a factory style appearance, correct belt alignment, and factory stability. Holley's kits supply the required brackets and hardware needed for installation.

    To determine correct application, these three easy steps will help get you going:

    • Step one is to determine your belt alignment based on your crank Pulley position on the engine you have.
    • Step two is to choose the Holley accessory drive brackets that you need (A/C, Alt & P/S or both).
    • Step three is to see which Holley installation kit your set–up requires to line up your accessories with your crank Pulley position. An application specific installation kit (part # 425211, 425212, or 425213) is REQUIRED for most applications.

    Note: When referring to guide links below, keep in mind that part numbers shown are MFG numbers without "425" prefix.

    Fitment and Required Components Guide for 20-135 Bracket Kit (PDF)

    Assembly Instructions for Holley 20-135 Accessory Drive Kit (PDF)