Mahle MS Piston Set GM LSX 428cid 4.125x1.110RCH 4.0 Stk 6.125 Rod .927 Pin -18cc 10.1CR - Set of 8

These Mahle MS pistons are forged from 2618 aluminum, a strong material chosen for its ability to handle the high stresses found in performance LSX engines. This set is specifically designed for 428 cubic inch displacements, featuring a 4.125-inch bore and a 4.000-inch stroke, which works with a 6.125-inch connecting rod and a 0.927-inch wrist pin. The -18cc dish volume, combined with these dimensions, helps achieve a 10.1:1 compression ratio, making them a solid choice for naturally aspirated or forced induction builds where precise compression is key.

Each piston weighs in at 429 grams, a well-balanced weight for performance applications that helps keep reciprocating assembly inertia manageable. The 1.110-inch compression height is also a critical measurement, ensuring proper piston-to-valve clearance and deck height when paired with the correct stroke and rod combination. Mahle is a well-known name in engine components, and this piston set reflects their focus on durable, high-performance parts for serious engine builds.

This set includes pistons for a complete 8-cylinder engine. Please note that these pistons are not CARB approved and cannot be shipped to California. It's always recommended to consult your engine builder or a qualified professional for specific installation procedures and compatibility with other engine components in your build.