Serpentine Conversion Pulley Set - High Water Flow Ratio Small Block Chevy
InfoVehicle Info Needed
MARCH PERFORMANCEPART NUMBER: 655-6380-08

Serpentine Conversion Pulley Set - High Water Flow Ratio Small Block Chevy

$25900
ShippingShips on 09/04/2026
Lowest PriceLowest Price Guarantee

Small Block Chevy With Standard Rotation Long Water Pump
Serpentine Conversion Pulley Set - High Water Flow Ratio
  • Small Block Chevy
  • Standard Rotation Long Water Pump
  • Black Powdercoat
  • 7" 6&6-Rib Crank Pulley
  • 5-1/4" 6-Rib Water Pump Pulley
  • 2-3/4" 6-Rib Alternator Pulley w/Cover

    Additional Required Components:

    • Power Steering Pulley Keyway P/N: 655-623
    • Power Steering Pulley Press Fit P/N: 655-624
    • March Chevy Serpentine Conversion Pulley Sets replace your low performance v-belts, eliminate belt throwing and slip while retaining your standard rotation water pump. These pulley sets are available in three ratios; Performance for limited street/racing applications, Mid Performance for weekend street/track and High Waterflow for daily drivers. Precision CNC machined from 6061-T6 aluminum for extra strength, wear and to run perfectly true. Finished with a ''No Polishing'' clear or protective silver powdercoat for a maintenance-free finish!

      Show MorePerformance Ratios
      Uses a smaller performance crank pulley and larger water pump pulley to increase horsepower by reducing accessory drag, with typical gains of 12-15 horsepower at the rear wheels.

      Mid Performance Ratios
      Uses performance crank pulley to decrease accessory speed to increase horsepower and a high water flow water pump pulley to maintain cooling.

      High Water Flow Ratios
      Increases cooling by speeding up water flow and fan speed. This helps at critical low speed driving where most overheating occurs.

    Part TypePulley Kit
    Product LineMarch Chevy Serpentine Conversion Pulley Sets
    BrandMARCH PERFORMANCE
    Package Height4.2
    Package Width11.5
    Package Length16.5
    Weight5.13 PG
    Part CategoryPerformance Parts
    Part FitmentSemi Universal
    Vendor Part Number6380-08
    Package Qty1
    Package TypeEA
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    Some parts are not legal for use in California or other states with similar laws / regulations
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