Holden / GM LS1,LS2 LS3 - 4.00" Extreme Boost Engine Kit - 2,000hp+

Extreme Boosted 2,000hp+ LS Engine Rotating Assembly Kit

Take your LS build to the next level with our Extreme Boosted LS Engine Kit – engineered for serious horsepower and maximum reliability under extreme boost pressures.

This premium kit includes:

✅ Full Counterweight Billet 4” Crankshaft

• Machined from solid billet steel (not forged) for unmatched grain alignment, strength, and durability

• Designed to handle extreme cylinder pressures found in big boost applications

• Note: A stock block will require clearancing to make space for the counterweights

✅ X300 Conrods (Set of 8)

• Made from ultra-high strength 300M material

• Engineered for extreme boost builds with massive 7/16” ARP2000 bolts standard (optional upgrade to ARP L19 available)

• Perfect for turbo, supercharged, and nitrous LS engines pushing beyond 1,500hp

✅ CP Bullet Power Adder Pistons (Set of 8)

• Designed specifically for boosted applications including turbocharged, supercharged, and nitrous engines

• Features thicker crowns, reinforced pin bosses, and superior alloy construction for maximum reliability

• Try our new LS Piston Finder to help select the right piston. Click here

✅ Athena Cut Ring Head Gaskets (Pair)

• The ultimate combustion sealing solution for extreme boost

• Stainless steel rings bite into the head for a secure seal, preventing head lift and blown gaskets under extreme pressure

Why Choose This Kit?

If you’re building a street monster, drag car, or record-chasing dyno engine, this kit provides the foundation you need to make big power safely and reliably. All components are carefully selected to work together for maximum performance and durability.