Mahle MS Piston Set GM LS 365ci 4.005in Bore 3.622in Stk 6.098in Rod .945 Pin 429g 10.5 CR Set of 8

Mahle's MS Piston Set is built for serious GM LS engine builds, featuring a 4.005-inch bore and a 10.5:1 compression ratio. These pistons are forged from 4032 aluminum, a well-known material for its strength and resistance to detonation, making them a solid choice for high-performance applications where reliability is key. The 3.622-inch stroke and 6.098-inch rod length are designed to work together to achieve the specified compression, while the 0.945-inch pin diameter ensures a strong connection to your connecting rods.

Each piston weighs in at 429 grams, contributing to a balanced rotating assembly which is crucial for smooth operation and longevity at higher RPMs. The -5.8cc dish volume is precisely machined to achieve the 10.5:1 compression ratio when paired with the correct cylinder head volume, allowing for optimal power output without excessive detonation risk on pump gas. This set includes eight pistons, ensuring you have everything needed for a complete V8 engine rebuild.

When rebuilding your LS engine, using a well-made piston set like this Mahle MS series is essential for achieving your performance goals. Remember that this part is not CARB approved and cannot be shipped to California. Always refer to manufacturer instructions for proper installation and assembly procedures.