Eagle Chevy 400 350 Mains 3.750in Crank 5.700in I-Beam Rods -20cc 4.155in Pistons Rotating Assembly

If you're building a performance Chevy 400 engine for naturally-aspirated racing, this Eagle Pro Street rotating assembly is a solid foundation. It's designed to handle the demands of the track, giving you the power and reliability you need when every component has to perform.

This assembly starts with a 3.750-inch forged 4140 crankshaft, featuring 350 main journal sizes for broad compatibility. Paired with it are 5.700-inch I-beam connecting rods made from strong 4340 steel, secured with 7/16-inch ARP 8740 bolts for dependable strength under high stress. The pistons are forged 4032 aluminum from Mahle, featuring an inverted dome design with a -20cc volume and a 4.155-inch bore size, ready for plasma-moly file-fit rings. To complete the package, it includes King XP rod and main bearings, known for their robust performance.

This rotating assembly is a significant step up for any performance build. Keep in mind that this part is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper assembly and torque specifications.