Mahle MS GM Duramax 4.095in 1/16in 2.0mm 3.0mm Drop In Rings

Mahle is well-known for making solid engine components, and their piston rings are a popular choice for rebuilds. This set, the 4095MDR, is specifically made for GM Duramax diesel engines with a 6.6L displacement. If you're rebuilding the top end of your Duramax, getting the right piston rings is crucial for sealing the combustion chamber, managing oil, and ensuring good compression.

This particular set is designed as a drop-in replacement, meaning it's built to fit directly into the pistons without needing special machining, which can save you time and money on the rebuild. The rings feature a specific size profile: a 4.095-inch bore diameter, with a 1/16-inch top ring, a 2.0mm second ring, and a 3.0mm oil control ring. This combination is engineered to work with the demands of a diesel engine, helping to maintain proper cylinder pressure and control oil consumption. The steel construction is a solid choice for the high temperatures and pressures found in diesel combustion.

It's important to note that these rings are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper ring gap setting and installation procedures to ensure optimal performance and longevity for your Duramax engine.