Eagle Chevy 409 4.000in Crank 6.135in H-Beam +.365in Dome 4.372in Pistons Balanced Assembly

This Eagle balanced rotating assembly starts with a 4.000-inch stroke crankshaft, a solid foundation for building a powerful Chevy 409 engine. The H-beam connecting rods measure 6.135 inches long, chosen for their strength and ability to handle high RPMs and significant cylinder pressures. These rods are paired with pistons featuring a +.365-inch dome, designed to achieve a specific compression ratio when used with the 4.000-inch stroke crank and your chosen cylinder heads.

Eagle has pre-balanced this entire assembly, which is a critical step for any performance engine build. Proper balancing reduces vibration, leading to smoother operation and less stress on bearings and other internal components. This saves you significant machine shop labor costs and ensures your engine runs as smoothly as possible. The components are selected to work together, aiming for a specific performance outcome for your 409 build.

This assembly is a significant step in rebuilding or upgrading your Chevy 409. It's important to note that this assembly is not CARB approved and cannot be shipped to California. Always consult with your engine builder or refer to Eagle's specific application notes for details on required supporting components and installation procedures to ensure optimal performance and longevity.