Mahle MS Piston Set GM Duramax 6.6L 4.095in Bore 3.898in Stk 6.417in Rod -40.7cc 17.0 CR Set of 8

With a 4.095-inch bore and a 3.898-inch stroke, this Mahle MS Piston Set is built for GM Duramax 6.6L diesel engines. These cast performance pistons are designed to handle the demands of modified or high-performance diesel applications. The -40.7cc dish volume contributes to a 17.0:1 compression ratio, a notable increase over stock, which can improve power output when paired with appropriate tuning and supporting modifications.

Mahle uses a TBC coating on these pistons, which is a thermal barrier coating. This helps to reduce heat transfer into the piston crown, keeping combustion temperatures more controlled. Each piston weighs in at 896 grams, and they utilize a 1.358-inch pin diameter with a 6.417-inch rod length. The overall piston height (CH) is 1.951 inches. This set includes eight pistons, designed to be a direct replacement for the factory components in terms of physical dimensions, making installation more straightforward for a professional mechanic.

This piston set is intended for engine builds where increased performance and durability are key. It's important to note that these pistons are not CARB approved and cannot be shipped to California. Ensure your build plans align with emissions regulations in your area. For a complete engine rebuild, consider pairing these pistons with quality rings, bearings, and a professional machining service to ensure optimal performance and longevity.