Eagle Chevy 400 3.750in Crank 6.000in I-Beam Rods -16cc 4.185in Pistons Balanced Assembly

If you're building a Chevy 400 engine for street use, this balanced rotating assembly from Eagle is a solid foundation. It's designed for pump gas and naturally aspirated applications, meaning it's built to perform reliably on regular fuel without forced induction. This assembly includes a 3.750-inch cast crankshaft, 6.000-inch I-beam connecting rods, and 4.185-inch forged pistons, all balanced as a complete unit to ensure smooth operation and reduce engine vibration.

The connecting rods are well-built with 3/8-inch ARP 8740 bolts, known for their strength and reliability in performance applications. The pistons are forged from 4032 aluminum and feature an inverted dome design with a -16cc volume and a 4.185-inch bore, paired with plasma-moly file-fit rings. This setup is designed to work with King SI rod and main bearings, providing durable support for the rotating assembly. The entire assembly is balanced, which is a critical step for engine longevity and performance, especially in street applications where smooth power delivery is key.

This rotating assembly is a comprehensive package for your Chevy 400 build. Please note that this assembly is not CARB approved and cannot be shipped to California. It also carries a Prop 65 warning.