Eagle Chevrolet Big Block +.060 Bore Competition Rotating Assembly Kit

If you're building a serious performance Chevrolet Big Block engine, this Eagle Competition Rotating Assembly Kit is a solid foundation. This kit is designed for demanding applications, including those using nitrous or forced induction, and it's built to handle the stress of racing. It's a comprehensive package that gives you the core rotating components needed to rebuild or upgrade your engine's internals.

At the heart of this assembly is a 4.250-inch forged 4340 steel crankshaft, chosen for its strength and durability under high loads. Paired with this are 6.385-inch H-beam connecting rods, which are well-known for their robust design. These rods are secured with 7/16-inch ARP 8740 bolts, a name trusted for their reliability in high-performance engine builds. The kit also includes forged 4032 aluminum pistons from MAHLE, featuring a -3cc flat top design and a 4.310-inch bore size, which is +.060 over the standard 4.250-inch bore. These pistons are matched with plasma-moly file-fit piston rings, allowing for precise ring gap adjustment to suit your specific build. Finally, the assembly is completed with KING XP rod and main bearings, offering excellent wear resistance and performance.

This kit is intended for competition use and is not CARB approved, meaning it cannot be shipped to California. It's a well-built package that brings together quality components from reputable manufacturers to create a strong rotating assembly for your performance Chevrolet Big Block engine.