Mahle MS Piston Set GM LSX 421cid 4.030x1.050RCH 4.125 Stk 6.125 Rod .927 Pin -5.8cc 11.2CR Set of 8

Mahle is a well-known name in the engine component world, especially for their high-performance pistons. This MS Piston Set is built for GM LSX engines displacing 421 cubic inches, offering a solid foundation for a serious engine build. If you're looking to get more out of your LSX, a well-built piston set like this is a critical piece of the puzzle.

These pistons are forged from 2618 aluminum, a strong material chosen for its ability to handle high stress and temperatures often found in performance applications. They feature a 4.030-inch bore and are designed to work with a 4.125-inch stroke and a 6.125-inch rod, resulting in a 11.2:1 compression ratio with the included -5.8cc dish volume. Each piston weighs in at 414 grams, which is a good balance for strength and rotational mass. The pin diameter is 0.927 inches. This set includes eight pistons, providing everything you need for a complete engine rebuild.

Keep in mind that these pistons are not CARB approved and cannot be shipped to California. Also, be aware of the Prop 65 warning associated with this product. When rebuilding your engine, ensuring you have the right components is key, and this Mahle piston set is a popular choice for those aiming for a robust and powerful LSX build.