Eagle Chevy 400 3.750in Crank 6.000in H-Beam -5cc Flat Top 4.155in Pistons Balanced Assembly

If you're rebuilding a Chevy 400 engine for serious performance, a balanced rotating assembly like this one from Eagle is a smart way to start. This assembly includes all the core components you need to get your engine's bottom end sorted, all balanced and ready to go. It's built to handle the demands of racing, including applications using nitrous or forced induction.

Eagle starts with a 3.750-inch forged 4340 crankshaft, known for its strength and durability under high stress. Paired with this are 6.000-inch H-beam connecting rods, which are robust enough for demanding use. These rods come with 7/16-inch ARP 8740 bolts, a popular choice for their reliability. The pistons are forged 4032 aluminum from Mahle, featuring a -5cc flat top design and a 4.155-inch bore size, which are common specs for Chevy 400 builds. They also include plasma-moly file-fit rings, giving you the flexibility to set your ring gaps precisely for your application. To top it off, King XP rod and main bearings are included, offering good performance and wear resistance for the rotating assembly.

This assembly is balanced from the factory, saving you a significant step and ensuring your engine runs smoothly. Keep in mind that this assembly is not CARB approved and cannot be shipped to California. It's a solid foundation for a high-performance engine build, but remember to consult your engine builder or service manual for specific installation procedures and any additional components you might need, such as gaskets, seals, or a torque wrench.