Mahle OE Cummins B102L37+A1.040 w/ PCR Eng Pack Piston With Rings Set (Set of 6)

When you're rebuilding the heart of your 1991 Dodge D250 with the Cummins engine, Mahle OE pistons are a solid choice. This set of six pistons comes with rings already mounted, along with the necessary pins and clips, making the installation process more straightforward for the engine builder. Mahle is a major OE piston manufacturer, meaning these parts are built to the same standards as what originally came in your truck.

These pistons feature compensated ring grooves. This design detail is important because it ensures the piston rings are loaded correctly, which directly impacts oil control and helps reduce blow-by. They also use expansion-controlled designs. This means they're made to have tight, but not too tight, clearances when installed. This reduces engine noise, lowers wear on components, helps keep emissions in check, and further improves oil management. This specific set is 0.040 inch undersize, which is crucial for engines that have had their cylinders bored out during a rebuild.

Because these are OE-quality parts from a well-known manufacturer, you can be confident in their fit and function. They are ready to install right out of the box, saving you time and effort during your engine build. Please note that these are not CARB approved and cannot be shipped to California.