Product Summary

Universal Fit, Water Pump Included, Alternator Included

    Key Specs

    MFG. Part #20-220
    Pulley StyleSerpentine
    Crankshaft Pulley IncludedNo
    Water Pump IncludedYes
    Water Pump MaterialCast Aluminum

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    Holley 20-220 Details


    Complete GM Gen V LT4 Accessory Drive System w/ Alt, P/S, A/C, Water Pump, Belts, and hardware.

    Holley's complete accessory systems for LT4 and LT5 applications have all accessories pulled up and in tight. Plus, they add the much needed hydraulic power steering solution. There are no shortcuts here. Holley incorporates a splined dual bearing system that eliminates all belt stresses on the P/S pump's internal bearings, assuring long life. The supercharger drive maintains the original and optimized belt path and tensioner. The accessory layout is as if the original manufacturer had designed it for your swap application. Included with each drive system is a throttle body angle correcting adapter that better positions the TB for swap applications as opposed to the aggressive original application intended angles. Versions of these accessory drives are available for both wet and dry sump applications.


  • Adds power steering without any belt load on the P/S pump
  • Notably more clearance to swap applications than other options
  • Original equipment look
  • LT4 style premium alternator
  • LT4 style water pump design
  • Compact SD7 A/C compressor
  • A/C line adapters included
  • Type II power steering pump
  • P/S hard line adapters included
  • Bottom outlet swivel heater hose options for swap application clearance
  • Throttle body angle correcting adapter for easier intake tube routing on swap applications
  • OE pulley ratios for optimal accessory performance, allows for larger SC crank pulley
  • Available LT4/5 dry-sump & LT4 wet-sump applications
  • LT4/5 specific accessories available for plumbing oil cooler and PCV oil separator OE system
  • Charts

    Holley 20-220 Specifications

    MFG. Part #20-220
    Pulley StyleSerpentine
    Crankshaft Pulley IncludedNo
    Water Pump IncludedYes
    Water Pump MaterialCast Aluminum
    Water Pump FinishNatural
    Water Pump Pulley IncludedYes
    Water Pump Pulley MaterialSteel
    Water Pump Pulley GroovesNon-ribbed
    Power Steering Pump IncludedYes
    Power Steering Pump Bracket FinishNatural
    Power Steering Pump Brackets IncludedYes
    Power Steering Pump Bracket MaterialAluminum
    Power Steering Pump FinishNatural
    Power Steering Pump Reservoir IncludedNo
    Power Steering Pump StyleType 2
    Power Steering Pulley AttachmentPress Fit
    Power Steering Pulley FinishBlack Painted
    Power Steering Pulley Grooves6-Rib | Serpentine
    Power Steering Pulley IncludedYes
    Power Steering Pulley MaterialSteel
    Alternator IncludedYes
    Alternator MaterialCast Aluminum
    Alternator FinishNatural
    Alternator Amperage150 amp
    One Wire AlternatorYes
    Alternator Pulley FinishBlack Painted
    Alternator Pulley Grooves6-groove, Serpentine
    Alternator Pulley IncludedYes
    Alternator Pulley MaterialSteel
    Alternator Bracket FinishBlack
    Alternator Bracket MaterialCast Aluminum
    Alternator Brackets IncludedYes
    A/C Compressor FinishNatural
    A/C Compressor IncludedYes
    A/C Compressor TypeSanden SD-7
    A/C Pulley FinishBlack Painted
    A/C Pulley Grooves6-groove, Serpentine
    A/C Pulley IncludedYes
    A/C Pulley MaterialSteel
    A/C Bracket FinishNatural
    A/C Bracket IncludedYes
    A/C Bracket MaterialCast Aluminum
    Idler Brackets IncludedYes
    Idler IncludedYes
    Tensioner IncludedYes
    Tensioner StyleHydraulic
    Tensioner Cover IncludedNo
    Hardware IncludedYes
    GTIN Code090127056479
    Sold in QuantityKit