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Installation Kit for GM Gen V LT Accessory Drive

Installation Kit for GM Gen V LT Accessory Drive - Allows use of High Mount LS Accessory Drive Systems on LT engine. Requires the use of an LS water pump and LT truck damper spacing.

PART# 21-5

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GM has updated its V8 performance engines and launched the new Gen V LT1 direct injected engine as a replacement for the very popular LS series of engines. This new accessory drive bracket installation kit allows the use of our popular & reliable Holley LS accessory drive bracket systems to be installed on the new LT1 engine. This drive system has incorporated an upgrade to the conventional looking and central located LS water pump which works in conjunction with an OEM LT1 truck harmonic balancer. This application fits all LT1 style engines (except the dry sump and supercharged applications). This new installation kit includes spacers for the LS style brackets, water pump spacers, a solenoid re-clocking retainer ring, re-routed front harness, and all hardware. This new installation kit works with existing high mount LS accessory drive brackets, accessories, LS Camaro style water pump, and LT1 truck harmonic balancer. These new kits allow you to choose the source for supplemental accessories and components that are often already on the donor engine or host vehicle. Whether sourcing from the salvage yard, the local auto parts store, your GM parts dealer, or Holley, you pick the accessories that match your needs and budget!


  • Mounts any of Holley’s popular High Mount accessory drive brackets to LT engines
  • Utilizes conventional LS center water pump (Holley P/N 22-100 or similar)
  • No engine modification required - completely bolt-on
  • Hides temperature sensor and harness connector from sight
  • Works with LT Truck Harmonic Balancer (often already on donor engine)
  • Cost Effective and Proven Solution
  • Utilizes conventional single sided belt
  • Easy Way to Add Power Steering w/ Your Gen-V LT Engine Swap!


Accessory Drive StyleHigh Mount
Emission Code5
EngineGM Gen V LT1
Product TypeAccessory Bracket
WarrantyLimited 90 Day
Part Number21-5

Service Parts



This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Tech Resources

This accessory drive installation kit must be use with an LS water pump and the LT Truck harmonic balancer. There is only one belt spacing on this accessory drive kit. Corvette and other LT engines must be use the Truck harmonic balancer. Does not fit dry sump applications. Patent Pending.

Warranty Information

Limited 90 Day: See Details
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