Product Summary

Universal Fit, Alternator Included, One Wire Alternator

    Key Specs

    MFG. Part #20-224BK
    Pulley StyleSerpentine
    Crankshaft Pulley IncludedNo
    Water Pump IncludedNo
    Water Pump Pulley IncludedNo

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    Holley 20-224BK Details

    Cast bracket and Premium 150 Amp Alternator with black finish for LT4 wet sump applications - used in LT Accessory Drive kits #20-220, #20-223, and #20-233.

    The alternator mount design offers more chassis clearance for LT4 engine swap applications. The kit can be used with existing OE (original equipment) accessories and mounting or in conjunction with the LT4 add-on hydraulic power steering kits, p/n: 20-222, 20-223 & 20-233.

    The components have an original equipment look and reliability while relocating the alternator in closer to the engine block for additional chassis clearance. The base kit Holley Part #20-226 is offered with a standard cast finish 105 amp alternator. Our premium kits, Holley #20-224 or #20-224BK offer the choice of a premium 150 amp alternator in cast or black finish. All three kits provide a complete, cost effective accessory solution for you LT4 crate engine with additional chassis clearance your application will need when compared to the OE option.


    • Provides additional clearance at the alternator while working with original equipment GM accessories and brackets
    • Design allows more chassis clearance for swap applications
    • Original equipment look and reliability
    • LT4 style premium 150 amp model alternator
    • Black Finish


    Holley 20-224BK Specifications

    MFG. Part #20-224BK
    Pulley StyleSerpentine
    Crankshaft Pulley IncludedNo
    Water Pump IncludedNo
    Water Pump Pulley IncludedNo
    Power Steering Pump IncludedNo
    Power Steering Pump Brackets IncludedNo
    Power Steering Pump Reservoir IncludedNo
    Power Steering Pulley IncludedNo
    Alternator IncludedYes
    Alternator MaterialCast Aluminum
    Alternator FinishBlack powdercoated
    Alternator Amperage150 amp
    One Wire AlternatorYes
    Alternator Pulley FinishBlack Powder Coated
    Alternator Pulley Grooves6-groove, Serpentine
    Alternator Pulley IncludedYes
    Alternator Pulley MaterialSteel
    Alternator Bracket FinishNatural
    Alternator Bracket MaterialCast Aluminum
    Alternator Brackets IncludedYes
    A/C Compressor IncludedNo
    A/C Pulley IncludedNo
    A/C Bracket IncludedNo
    Idler Brackets IncludedNo
    Idler IncludedYes
    Tensioner IncludedYes
    Tensioner StyleHydraulic
    Tensioner Cover IncludedNo
    Hardware IncludedYes
    GTIN Code090127056547
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