Eagle Chevy 400 3.875in Crank 6.000in H-Beam Stroker Rods -16cc 4.165in Pistons Rotating Assembly

If you're building a high-performance Chevy 400 small block and looking to increase displacement and power, a balanced rotating assembly is the foundation. This Eagle stroker kit is designed to give your engine a significant boost in cubic inches, typically taking a 400ci block out to around 434ci with the included 3.875-inch crankshaft and 4.165-inch pistons. It's a popular choice for those aiming for serious street performance or track use where increased torque and horsepower are key.

This assembly features Eagle's well-known 4340 forged steel H-beam connecting rods, which are strong and reliable for demanding builds. They measure 6.000 inches long, a common length that works well with many piston designs and helps manage piston speed and rod angle. The kit includes pistons designed for a -16cc combustion chamber, which is crucial for achieving a desired compression ratio when paired with your cylinder heads. The 3.875-inch stroke crankshaft is forged from 4340 steel, offering the durability needed to handle increased cylinder pressures and RPMs. Everything in this kit is balanced, meaning the crankshaft, rods, pistons, wrist pins, and rings are precisely weighted and matched to minimize engine vibration and ensure smooth operation at higher speeds.

When installing this rotating assembly, it's important to ensure your engine block is properly machined and clearanced for the larger stroke and bore. The included pistons are designed for a 4.165-inch bore. Always follow manufacturer specifications for bearing clearances, ring gap, and piston-to-valve clearance. This kit is not CARB approved and cannot be shipped to California. For builds outside of California, it represents a solid starting point for a powerful, custom engine.