Eagle Chevy 350 3.750in Crank 6.000in H-Beam -5cc Flat Top 4.030in Pistons Balanced Assembly

If you're building a high-performance Chevy 350 for serious racing, especially with nitrous or forced induction, a balanced rotating assembly like this one from Eagle is a critical starting point. This assembly bundles together the core components that spin inside your engine, all balanced as a set to ensure smooth operation and reduce vibration at high RPMs. Getting this right from the start saves a lot of headaches down the road.

Eagle uses a forged 4340 steel crankshaft with a 3.750-inch stroke, paired with 6.000-inch H-beam connecting rods. These rods are secured with 7/16-inch ARP 8740 bolts, known for their strength and reliability under stress. The pistons are forged 4032 aluminum from Icon, featuring a -5cc flat top design and measuring 4.030 inches in bore size, which is standard for many 350 builds. They come with plasma-moly file-fit piston rings, giving you the flexibility to set the ring gap precisely for your specific application, which is important for sealing and performance, especially with boosted engines. To top it off, King XP series rod and main bearings are included, offering robust performance for demanding conditions.

This assembly is balanced from the factory, meaning Eagle has pre-weighted the components to work together, saving you a significant step and cost in the engine building process. Keep in mind that this assembly is not CARB approved and cannot be shipped to California. Always refer to manufacturer instructions for proper installation and assembly procedures.