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March Performance 20423

Outward Mount High Water Flow Serpentine Drive Kit (A)=3-9/32" Includes Brackets and Pulleys to Install:

March Performance 20423


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Estimated to ship directly from the manufacturer on 06/06/18
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March Performance 20423 Outward Mount High Water Flow Serpentine Drive Kit (A)=3-9/32" Includes Brackets and Pulleys to Install: $1,169.99
Outward Mount High Water Flow Serpentine Drive Kit
  • (A)=3-9/32"
    Includes Brackets and Pulleys to Install:
  • Reverse Rotation Short Water Pump
  • Driver Side Alternator
  • Sanden 505 or 508 A/C Compressor
  • Saginaw Press Fit Power Steering Pump

  • March Performance 20423 Details

    Deluxe Series Outward Mount Serpentine Kits

  • High Water Flow Ratio Pulleys
  • Reverse Rotation Water Pump
  • Check Bolt pattern (A) 3-9/32" Bolt Hole Centers; Fits GM L98 & ZZ4 Aluminum Cylinder Heads

    Kit drives:
    GM 6-12 o'clock mount 6" or 7" dia. alternator
    Sanden 505 or 508 serpentine compressor
    Water Pump
    1984-91 Corvette - Reverse rotation
    Saginaw Keyway Power Steering Pump
    1966-74 keyway Saginaw pump with canister
    Saginaw Press Fit Power Steering Pump
    1975-78 press fit Saginaw pump with canister
    Remote Reservoir Power Steering Pump
    1987 Sunbird small remote reservoir pump
    Belt Size
    Dayco 6-rib belt

  • Uses Gates belt #465-K061031

  • Specifications:

    Manufacturer's Part Number:

    March Chevy Small Block Blower, Ram Jet and Multi-Carbs Outward Mount Serpentine Kits is designed to solve the issue with mounting your accessories on engines with blowers, superchargers, Ram Jet style fuel injection or multiple carburetors. They replace your low performance V-belts, pulleys, brackets and eliminate any issues with belt throwing. Complete and simple to bolt on...these "Deluxe" outward mount kits use original style mounting brackets to locate your alternator and A/C outside the engine outline and back towards the cylinder heads, ideal for engine compartments with minimal engine to radiator clearance. Precision CNC-machined from solid billet 6061-T6 aluminum to fit perfectly as well as handle high torque and vibration.

    The high tensile strength of the material combined with the hard coating on all high wear areas means a much longer duty life than common cast pulleys with no chance of any type of fracturing or structural failure. The street rod ratio pulleys allow increased water flow and fan speed, which is critcial at low speed driving. All pulleys and brackets have a "No Polishing" maintenance-free clear powdercoating. An adjustable stainless steel tensioning rod with chrome-moly rod ends and mounting hardware is also included.

    Kits Include:
  • Alternator Bracket
  • Alternator Pulley with Fan and Nose Cover
  • Water Pump Pulley with Nose Cover
  • Crankshaft Pulley
  • Two Idler Brackets; One with Dual Idlers, One with Single Idler
  • Heater Hose Extension Fitting
  • Tensioning Rods & Adjustable Rod Ends
  • Grade 8 Mounting Hardware

    Power Steering Kits Add:
  • Power Steering Bracket & Pulley

    A/C Kits Add:
  • A/C Bracket, Hardware and Nose Cover

    Kits Require:
  • Fits most 1955 and newer Chevys and 1963-82 Corvettes with Blower/Supercharger, Ram Jet style fuel injection or multiple carburetors.
  • Will not fit 62-67 Novas with factory shock towers
  • Up to 17'' Clearance from water pump centerline to side of engine compartment (see diagram below)
  • Water pump pulley with nose cover extends 6.5'' from engine block, plus you will need to consider clearance for a mechanical or electric cooling fan
  • A reverse rotation 1984-91 Corvette water pump
  • Two accessory holes in cylinder head for mounting
  • If using ZZ4 timing cover you will have to modify short water pump for clearance
  • GM 10si style alternator with mounting tabs at 6 and 12 O'Clock
  • Power steering kits require power steering pump style specified, must have side motor mounts on 1955-57 Chevy, must use remote reservoir style on Chevelle, Monte Carlo, El Camino, 1970-up Camaro and S-10
  • A/C kits require a Sanden 505 or 508 Compressor

  • Items You Need
    Some parts are not legal for use in California or other states with similar laws / regulations