Product images and videos are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Moderate — 2–4 hours
Overview
Show original supplier description
Part #: 21-5
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).
Features:
- 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!
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.
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Holley |
| Part Number | H00E 21-5 |
| Weight | 6.75 lb |
About MOTORMIA
Buy with Confidence
Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return PolicyShipping
Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.
View Full Shipping Policy