Eagle Chevy 400 Heavy Duty Assembly 409 Cid / 4.165in Bore Size / -28cc

If you're building a serious competition engine for your Chevy 400, especially one that will see exotic fuels, heavy nitrous use, or high boost levels, a robust rotating assembly is the foundation you need. This Eagle Heavy Duty Rotating Assembly is designed to handle those demanding conditions, giving you the confidence to push your engine to its limits.

At the heart of this assembly is a 3.750-inch forged 4340 steel crankshaft, known for its strength and durability under high stress. Paired with it are 6.000-inch H-beam connecting rods, which are a popular choice for their excellent strength-to-weight ratio. These rods are secured with 7/16-inch ARP 2000 bolts, a well-regarded fastener system that ensures reliable clamping force even under extreme loads. The pistons are forged 2618 aluminum from JE, featuring an inverted dome design with a -28cc volume, specifically intended for forced induction applications and a 4.165-inch bore size. They come complete with plasma-moly file-fit rings, which offer good sealing and durability in high-performance scenarios. Finally, King XP Rod and Main Bearings are included, providing smooth operation and wear resistance for critical rotating components.

This assembly is a well-built package for those aiming for maximum performance and reliability in extreme engine builds. Please note that this assembly is not CARB approved and cannot be shipped to California. It also carries a Prop 65 warning.