Mahle OE 11-16 GM 6.6L DURAMAX LML/LGH 0.25MM Piston With Rings Set (Set of 8)

These Mahle OE pistons are 0.25mm undersize, meaning they are designed to fit cylinders that have been bored out to a slightly larger diameter during an engine rebuild. This set is built for GM 6.6L Duramax LML and LGH engines found in trucks from 2011 through 2016, including popular models like the Chevrolet Silverado HD and GMC Sierra HD. Mahle is a major OE piston manufacturer, and these pistons carry that same quality and attention to detail.

What sets these pistons apart is their compensated ring grooves. This design feature ensures the piston rings are loaded correctly, which is crucial for proper oil control and preventing blow-by. They also feature an expansion-controlled design. This means the pistons are made to maintain small, precise clearances within the cylinder bore, even as temperatures change. This tight clearance helps reduce engine noise, minimize wear over time, and keep emissions and oil consumption in check. Mahle makes installation convenient by including the piston rings, wrist pins, and clips already mounted on the pistons, so they're ready to go right out of the box for your engine builder.

This set includes eight pistons, enough for a complete engine overhaul on your V8 Duramax. Because these are 0.25mm undersize, they are intended for use in engines where the cylinders have been machined to match this specific bore size. Always confirm your cylinder bore measurements before ordering to ensure the correct fitment for your rebuild project.