Eagle Chevy 409 4.000in Crank 6.135in H-Beam +.365in Dome 4.342in Pistons Balanced Assembly

Starting with a 4.000-inch stroke forged crankshaft, this balanced rotating assembly from Eagle is built for serious Chevy 409 performance builds. The crankshaft is paired with 6.135-inch long H-beam connecting rods, known for their strength and ability to handle high RPMs and significant cylinder pressures. These rods are designed to work with the included 4.342-inch bore pistons, which feature a +.365-inch dome to achieve a specific compression ratio suitable for performance applications.

This assembly is fully balanced, meaning the crankshaft, connecting rods, pistons, and wrist pins have been precisely weighted and matched. This balancing is crucial for reducing engine vibration, which in turn lowers stress on bearings and other internal components, leading to a smoother running engine and improved longevity. The H-beam design of the connecting rods offers a robust construction that resists bending and flexing under extreme loads, making it a popular choice for modified engines.

This balanced rotating assembly is a significant upgrade for anyone rebuilding or building a high-performance Chevy 409 engine. It's important to note that this assembly is not CARB approved and cannot be shipped to California. Always consult your engine builder or refer to manufacturer specifications for precise installation requirements and compatibility with your specific engine block and cylinder heads.