CP Chevrolet 6.6L Duramax - Bore (4.055in) - Stroke (3.8976in) - Rod (6.4181in) - Set of 8

If you're rebuilding the top end of a Chevrolet 6.6L Duramax engine and looking for a strong foundation, this set of forged pistons from CP Pistons is a solid choice. These pistons are built to handle the demands of a high-performance diesel engine, whether you're pushing the limits on the track or just want a more robust setup for heavy towing. They are designed with specific bore, stroke, and rod dimensions to integrate seamlessly into your engine build.

CP Pistons are well-known for their robust construction, and this set is no exception. Forged from high-strength aluminum alloy, these pistons offer improved durability and resistance to detonation compared to cast pistons. The precise machining ensures a consistent fit and proper sealing within the cylinder bore, which is crucial for maintaining compression and preventing blow-by. The included dimensions—a 4.055-inch bore, 3.8976-inch stroke, and 6.4181-inch rod length—are key specifications for ensuring compatibility and optimal performance within the 6.6L Duramax platform. This set includes eight pistons, enough for a complete engine rebuild.

When undertaking a major engine project like this, it's important to ensure all components are properly matched. These pistons are designed to work with the specific architecture of the 6.6L Duramax, but always refer to your engine's service manual for complete assembly procedures and recommended clearances. Because these are performance-oriented components, it's common practice to have cylinders honed to match the piston skirt design for optimal oil control and ring seal. Please note that this part is not CARB approved and cannot be shipped to California.