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  • KRC KRC40400360 Adjustable Idler/Tensioner Assembly, Small Block Chevy
    KRC KRC40400360 Adjustable Idler/Tensioner Assembly, Small Block Chevy
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    KRC's adjustable idler - tensioner is used to keep proper belt tension and prevent belt slippage when using a mechanical fan. This can occur on both single drive belt and pulley systems that have a steering pump mounted of the front of an engine.

    KRC's idler tensioner is essential on dirt cars. Belt slippage can occur on cars that exceed 7,000 RPM and/or use a large or heavy fixed fan blade or a fan blade with a lot of pitch, which potentially causes overheating & pulleys to wear faster. This occurs on both single drive belt and pulley systems with a power steering pump mounted on the front of the engine. 

    Fan belts and pulleys work to slow down the fan. The belt slips because it is stretching to slow the fan. The belt heats up as the the the stretching increases. The only way to properly tension the belt is with an adjustable idler/tensioner. This keeps the engine running cooler because the belt is tighter. This will allow faster acceleration out of turns and harder braking on corners.

    • Designed for GM 602 & 604 Crate Engines
    • Use with KRC serpentine drive systems
    • Assembly contains:
      • Idler - Tensioner
      • Hardware and Instructions

     

     

  • Gilmer Drive Belts
    From: $32.99
    Gilmer Drive Belts
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                Gilmer Replacement belts availabe in 1/2" and 1" widths and several lengths: 22-1/2", 24", 25-1/2", 27", 30", 32-1/5", and 34-1/2".

     

  • Powermaster 170 Serpentine Alternator Drive Kit / Water Pump Drive System
    Powermaster 170 Serpentine Alternator Drive Kit / Water Pump Drive System
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                Convert your Powermaster 50 or 75 amp mini alternator to a 3 groove serpentine style belt. This system will not interfere with any other pulleys being used, as it mounts on the front of the water pump pulley. Comes complete with alternator and water pump pulleys and a 24" belt.
    • Includes 2 pulleys and 24" belt
    Note: Serpentine style belts are not approved for IMCA Northern Sport Mods
  • Rons Racing Product 48XL037SP007 Gold Belt Drive Fuel Pump Pump Pulley
    Rons Racing Product 48XL037SP007 Gold Belt Drive Fuel Pump Pump Pulley
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                Replacement pulley for the Gold Belt-Drive Fuel Pumps 910-11585 and 910-11584.
            
  • Holley 20-132 LS Accessory Drive Bracket-ALT, P/S, A/C
    Holley 20-132 LS Accessory Drive Bracket-ALT, P/S, A/C
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                Please view the product's page for more information
            
  • Rons Racing Products 4020 Replacement Pulley, Belt Drive Pump
    Rons Racing Products 4020 Replacement Pulley, Belt Drive Pump
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                Replacement pulley for Fuel pump kit #910-11580.
    • Flange Diameter:  1.125"
    • Hole Diameter:  0.624"
    • Overall Thickness:  1.215"
    • Depth:  0.493"
    • O.D:  4.262"
    • Tooth Count:  36
  • KRC KIT16312015 Basic Serpentine Drive Kit-Crate Chevy Block Mt. Pump
    KRC KIT16312015 Basic Serpentine Drive Kit-Crate Chevy Block Mt. Pump
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    KRC's basic kits are the perfect starting point for your GM 602 & 604 Crate Engines. Select the kit with the options that suit your application, then choose the appropriate accessory to complete your kit.

    • Complete basic kit
    • GM 602 & 604 Crate Engines
    • Assembly contains:
      • 7.2cc aluminum power steering pump
      • 4.2" aluminum power steering pulley
      • Aluminum driver side lower block mounted power steering pump bracket
      • Pro series pulley kit
      • KRC high performance water pump
      • Water pump spacers
      • Goodyear Gatorback belt
      • Hardware and detailed instructions

    Get the correct pulleys for your application by learning which water pump you have as explained in our tech article. SBC - Short vs Long Water Pump.

    Cast Iron Pump Tech (PDF)

    Cast Iron Pump Installation Instructions (PDF)

    New Pump Tips (PDF)

    Serpentine Pulley Offset (PDF)

  • 1949-53 Flathead Car/Pickup Water Pump with Wide Belt
    1949-53 Flathead Car/Pickup Water Pump with Wide Belt
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    Original flathead water pumps have always suffered from unreliable bronze bushings and carbon seals. They almost always leaked and even Ford manuals warned mechanics not to tighten fan belts too tight. The excess slack allowed belts to slip and lose contact with the generator and water pump pulleys, causing more cooling and power problems.

    Speedway's completely new water pumps feature severe-duty roller and ball bearings, close tolerances and modular impellers to provide maximum flow and reduce cavitation. They also have modern ceramic seals on a heavy duty 3/4" shaft, making the assembly exceptionally strong and more efficient.

    Note: This water pump is for 1949-1953 engines in 1948-1952 pickups or 1932-1948 cars.

    • Flathead Water Pump Features (Link)
    • Designed for use with 5/8" belt drive system
    • Severe-duty roller and ball bearings
    • Ceramic seals on sturdy 3/4" shaft
    • High-flow modular impeller reduces cavitation
    • Includes gasket and a connection for the heater hose return

    1949-1953 Flathead Water Pump Installation Instructions (PDF)

  • KRC KIT16390000 Denso Alt Bracket-Idler Tensioner Basic Drive Kit SBC
    KRC KIT16390000 Denso Alt Bracket-Idler Tensioner Basic Drive Kit SBC
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    KRC's idler tensioner is a neccessity on dirt cars because elt slippage can occur on cars that exceed 7,000 RPM. They are also vital if you use a large or heavy fixed fan blade or a fan blade with a lot of pitch. These can potentially causes overheating faster wear. This occurs on both single drive belt and pulley systems with a power steering pump mounted on the front of the engine.

    This happens because the fan belt and pulleys are required to slow the fan. The belt stretches so it slips while braking, inducing heat into the belt. The belt will continue to stretch as the race goes on, causing engine temperature to slowly climb. To properly tension the belt to prevent slippage is with an idler or tensioner pulley mounted on the passenger side of the engine. This helps the engine run cooler and the belt tighter, allowing faster acceleration out of turns & harder braking on corners.

    • Designed for GM 602 & 604 Crate Engines
    • Works great with mechanical fans
    • Assembly contains:
      • Idler - Tensioner
      • Alternator Bracket
      • 3.5" 3-Rib Serpentine Aluminum Pulley
      • Goodyear Gatorback Belt
      • Hardware and Instructions
  • Billet FM2121PC SBC Mid Mount Serpentine Conversion Kit, Keyway Shaft
    Billet FM2121PC SBC Mid Mount Serpentine Conversion Kit, Keyway Shaft
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                Please view the product's page for more information
            
  • Weiand 392 Dodge/Chrysler Hemi 6-71 Supercharger Blower Kit, Plain
    Weiand 392 Dodge/Chrysler Hemi 6-71 Supercharger Blower Kit, Plain
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    You have to admit that there's nothing cooler than a blown street engine. These Weiand Street Blower Kits include intake, drive pulleys and belt, new 6-71 supercharger, 2 four barrel carb adaptors and all hardware needed to install the kit. Available in plain or polished.

     

    • Generates 50%+ more horsepower
    • Increased torque across the RPM range
    • CNC machined case and rotors
    • 1/2" pitch drive
    • Matched gear sets for precise rotor alignment
    • 34 Tooth Lower Pulley
    • 38 Tooth Upper Pulley
    • 10.5% underdriven
    Note: The 392 Hemi kit requires a stock 1958-earlier harmonic balancer that maintains and uses the early Hemi balancer bolt pattern. It has 5 evenly spaced holes and 1 hole that is slightly rotated a few degrees. To use it with a balancer with 6 evenly spaced holes, redrilling/modification of the pulley will be required. Must also be used with the B/B Chevy water pump conversion. Kit includes a remote thermostat housing mount and matching bracket.

     

    805-7481 Instructions (PDF)

    805-7481 Instructions (Part 2) (PDF)

  • 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
            
  • Moroso 63846 Small Block Ford Mandrel Drive Kit
    Moroso 63846 Small Block Ford Mandrel Drive Kit
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    This mandrel drive kit is just the ticket if you are running a S/B Ford with a belt drive pump. Includes a 16 tooth Gilmer pulley, 2-1/2" v-belt pulley and required spacers to work with most combinations. Fits balancers with a 2.11, I.D. and 3 or 4 bolt pattern with pulleys.

    • Fits Small Block Ford 302-351W with either three or four mounting bolts
    • 3.30" bolt circle, 2.432" male register—will NOT fit 289
    • Hub mounted to harmonic balancer
    • Pulleys are 6061-T6 aluminum and hard coat anodized for exceptional strength and extended service life

    Includes: 2-1/2" V-belt pulley for vacuum pump, 1" (16-tooth) Gilmer pulley for external oil pump, guide plates, assorted spacers, belt guides and hardware.

  • KRC Power Steering 77525000 CT525 GM LS Water Pump Only Drive Kit
    KRC Power Steering 77525000 CT525 GM LS Water Pump Only Drive Kit
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    KRC's water pump only drive kit for the CT525 includes everything you need to finish the front of the engine. The water pump that comes on the CT525 has no provision for a mechanical fan to attach. KRC's kit replaces the water pump with a clockwise rotation Stewart Pro Series water pump. Also included is KRC's idler-tensioner to keep proper belt tension and prevent belt slippage when using a mechanical fan.

    In addition, a R-LOK crank adapter and pulley, Pro Series water pump pulley, water bypass fittings and hose kit, water pump fittings, water pump spacers, two Goodyear Gatorback belts, hardware and spacers and installation instructions are all included.

  • Plain 1946-1953 Flathead Alternator Bracket
    Plain 1946-1953 Flathead Alternator Bracket
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    Just because you've got a vintage Flathead Ford V8 in your ride doesn't mean you're stuck with the antiquated charging system. Switching to a tried-and-true GM 1-wire alternator is a great upgrade for any Flathead-equipped vehicle with a 12-volt electrical system.

    • Bracket fits 1946-1953 V-8 engines
    • Heavy-duty steel construction
    • Can easily be painted to match your engine
    • Designed to work with the two narrow-belt drive system typical of late '50-'53 Ford/Mercury passenger cars
    • Will not work with single wide belts unless the alternator is modified (see Notes)

    Mounting Guide (Link)

  • Powermaster 8-800 Small Block Chevy 50 Amp Mini Alternator Kit w/V-Belt
    Powermaster 8-800 Small Block Chevy 50 Amp Mini Alternator Kit w/V-Belt
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    Powermaster provides all the electrical punch you need, while saving weight and space. One-wire unit for small block Chevys using short water pumps. Mounts on either side of engine. Cranks out 14.7 volts and 53 amps. Kit includes mini alternator, brackets, bolts, spacers, drive pulley and belt.

    • True 1-wire hookup with set voltage of 14.7
    • High output to weight ratio
    • Low drag, high speed bearings
    • Black heat dispersant coating

     

    Small Block Chevy Mini Alternator Dimensions (Link)

  • Powermaster 8-722 Small Block Chevy 75 Amp Mini Alternator w/Serp-Belt Kit
    Powermaster 8-722 Small Block Chevy 75 Amp Mini Alternator w/Serp-Belt Kit
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    Powermaster provides all the electrical punch you need, while saving weight and space with these racing alternator kits. One-wire unit for small block Chevy using short pump only. Mounts on either side of engine. Cranks out 14.7 volts and 75 amps. Kit includes mini alternator, brackets, bolts, spacers, drive pulley and belt.

    • True 1-wire hookup with set voltage of 14.7
    • High output to weight ratio
    • Excellent idle output
    • Gold battery post
    • Operating Range: -40°C to 150°C
    • Max RPM: 18,000
    • Weight: 8.885 lbs.

    NOTE:  Mini alternators are NOT IMCA approved for Hobby Stock or Sport Mod Divisions.

  • Powermaster 8-801 Small Block Chevy 50 Amp Mini Alternator Kit w/Serp-Belt
    Powermaster 8-801 Small Block Chevy 50 Amp Mini Alternator Kit w/Serp-Belt
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    Powermaster provides all the electrical punch you need, while saving weight and space. One-wire unit for small block Chevys using short water pumps. Mounts on either side of engine. Cranks out 14.7 volts and 53 amps. Kit includes mini alternator, brackets, bolts, spacers, drive pulley and belt.

    • True 1-wire hookup with set voltage of 14.7
    • High output to weight ratio
    • Low drag, high speed bearings
    • Black heat dispersant coating

    NOTE: Mini alternators are NOT IMCA approved for Hobby Stock or Sport Mod Divisions.

    Small Block Chevy Mini Alternator Dimensions (Link)

  • Powermaster 8-721 Small Block Chevy 75 Amp Mini Alternator w/V-Belt Kit
    Powermaster 8-721 Small Block Chevy 75 Amp Mini Alternator w/V-Belt Kit
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    Powermaster provides all the electrical punch you need, while saving weight and space with these racing alternator kits. One-wire unit for small block Chevy using short pump only. Mounts on either side of engine. Cranks out 14.7 volts and 75 amps. Kit includes mini alternator, brackets, bolts, spacers, drive pulley and belt.

    • True 1-wire hookup with set voltage of 14.7
    • High output to weight ratio
    • Excellent idle output
    • Gold battery post
    • Operating Range: -40°C to 150°C
    • Max RPM: 18,000
    • Weight: 8.885 lbs.


  • Holley 21-3 LS Acc Drive Bracket Install. Kit, Long, Long Style Pump
    Holley 21-3 LS Acc Drive Bracket Install. Kit, Long, Long Style Pump
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                Please view the product's page for more information
            
  • V-Belt Mandrel Drive Pulley
    $24.99
    V-Belt Mandrel Drive Pulley
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    V-belt pulley for 1" mandrel drive.

  • Holley 20-134 LS Accessory Drive Bracket, Passenger Side A/C
    Holley 20-134 LS Accessory Drive Bracket, Passenger Side A/C
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                Please view the product's page for more information
            
  • Speedway 30% Reduction Pulley Combo for S/B Chevy Short Pump
    Speedway 30% Reduction Pulley Combo for S/B Chevy Short Pump
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    Kit includes a cast aluminum double groove cast aluminum water pump pulley, crank pulley, and a matched pair of heavy duty belts. Slows water pump speed by 30% for increased horsepower.

    Fits Small Block Chevy V8 with '55-'68 short-style water pump with 5/8" shaft.

    Get the correct pulleys for your application by learning which water pump you have as explained in our tech article. SBC - Short vs Long Water Pump.

  • Small Block Chevy Inboard Drive Kits, Alternator
    Small Block Chevy Inboard Drive Kits, Alternator
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    We all know what a pain it is to come up with a pulley, bracket, and belt combination to work on your small block Chevy engine. We have pre-engineered our package to include the nuts, bolts, polished billet aluminum brackets and belts to make this a simple installation. Each kit also includes a new short style aluminum water pump, aluminum pulleys, one wire chrome alternator and if chosen, a chrome A/C compressor. 

    Inboard (high) mount brackets for early cars.

    Alternator only kits include single groove pulleys.

    Note: S/B Chevy, short style water pump only.

  • Small Block Chevy Inboard Drive Kits, Alternator & AC
    Small Block Chevy Inboard Drive Kits, Alternator & AC
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    We all know what a pain it is to come up with a pulley, bracket, and belt combination to work on your small block Chevy engine. We have pre-engineered our package to include the nuts, bolts, polished billet aluminum brackets and belts to make this a simple installation. Each kit also includes a new short style aluminum water pump, aluminum pulleys, one wire chrome alternator and if chosen, a chrome A/C compressor. 

    Inboard (high) mount brackets for early cars.

    Alternator and A/C kits include dual groove pulleys.

    Bracket kit works with dual quad & 3-2 low rise intakes.

    Note: S/B Chevy, short style water pump only.

  • Garage Sale - Powermaster 8-721 Small Block Chevy 75 Amp Mini Alternator w/V-Belt Kit
    New
    Garage Sale - Powermaster 8-721 Small Block Chevy 75 Amp Mini Alternator w/V-Belt Kit
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                Please view the product's page for more information
            
  • Small Block Chevy Aluminum Triple Lower Pulley, Short Pump
    Small Block Chevy Aluminum Triple Lower Pulley, Short Pump
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    Cast aluminum 3-groove V-belt crankshaft pulley for use with '55-'68 Small Block Chevy short style water pumps.

    • Precision machined aluminum construction
    • Lightweight and strong
    • Three grooves for 3 V-belts

    Get the correct pulleys for your application by learning which water pump you have as explained in our tech article. SBC - Short vs Long Water Pump

  • 1937-48 Flathead Stock-Style Water Pump with Wide Belt
    1937-48 Flathead Stock-Style Water Pump with Wide Belt
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                Original Flathead water pumps have always suffered from unreliable bronze bushings and carbon seals. They almost always leaked and even Ford manuals warned mechanics not to tighten fan belts too tight. The excess slack allowed belts to slip and lose contact with the generator and water pump pulleys, causing more cooling and power problems. 

    Speedway's completely new water pumps feature severe-duty roller and ball bearings, close tolerances and modular impellers to provide maximum flow and reduce cavitation. They also have modern ceramic seals on a heavy duty 5/8" shaft, making the assembly exceptionally strong and more efficient. All mounting areas are spot faced for improved fit and sealing.

    • All-new high-nickel iron castings
    • Severe-duty roller and ball bearings
    • Ceramic seals on sturdy 3/4" shaft
    • High-flow modular impeller reduces cavitation
    • Gaskets included
    • For systems with 5/8" drive belts

    Factory replacement for 1937-1948 Ford and Mercury cars and trucks. Includes gaskets.

    Water Pump Features (GIF)

    910-15593 Instructions (PDF)

  • 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)   

  • Rons Racing Products 24XL037 Gold Belt Drive Fuel Pump Mandrel Pulley
    Rons Racing Products 24XL037 Gold Belt Drive Fuel Pump Mandrel Pulley
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                Replacement pulley for Gold Belt Drive Fuel Pump mandrel.
            
  • 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
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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 20-135 Bracket Kit (PDF)

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

     

  • Holley 20-133 RF Compressor LS Acc Drive Brackets, Pass. Side AC
    Holley 20-133 RF Compressor LS Acc Drive Brackets, Pass. Side AC
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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 20-133 Bracket Kit (PDF)  

    Assembly Instructions for Holley 20-133 Accessory Drive Kit (PDF)   

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