Installation Kit For LS Accessory Bracket Kits

The Holley Installation Kit For LS Accessory Bracket Kits (Part #21-1) is a complete hardware and spacer solution designed specifically for GM LS-series engine builds. This kit addresses a critical installation requirement for builders integrating aftermarket accessory brackets while maintaining proper belt alignment and component clearance. The kit includes all necessary mounting hardware and precision spacers to ensure correct positioning of accessories relative to the engine's serpentine belt system.

Proper belt alignment is essential for LS engine longevity and accessory performance. Misaligned brackets create binding friction, accelerate wear on belts and pulleys, and can lead to accessory failure or slippage under load. This Holley installation kit eliminates guesswork by providing factory-engineered spacers and fasteners that position brackets at the manufacturer's intended geometry. The hardware included is rated for the standard belt tension and vibration loads typical of LS platform engines, whether naturally aspirated or boosted.

LS engine builders—whether tackling street performance, race applications, or engine swaps—benefit from having the correct installation components on hand. This kit is particularly valuable for those upgrading alternators, power steering brackets, air conditioning compressors, or other bolt-on accessories where bracket positioning directly affects serpentine belt routing. Using Holley's engineered hardware ensures compatibility across the broad LS engine family, including LS1, LS2, LS3, LS7, and LS9 variants.

Packaged at 2 pounds and dimensioned for efficient storage, this installation kit is a practical addition to any serious LS builder's toolkit. Holley's reputation in the fuel systems and engine management space extends to mechanical components that meet the precision expectations of professional engine builders and dedicated enthusiasts alike.