Mahle MS Piston Set GM LSX 399cid 4.185x1.304CH 3.622 Stk 6.125 Rod .927 Pin -5.8cc 10.6CR Set of 8

Mahle's MS Piston Set is built for serious performance builds on GM LSX engines, specifically for the 399 cubic inch displacement. These pistons feature a 4.185-inch bore and a 3.622-inch stroke, designed to work with a 6.125-inch connecting rod and a 0.927-inch wrist pin. The -5.8cc dish volume contributes to a 10.6:1 compression ratio, which is a popular choice for naturally aspirated or boosted applications seeking a balance of power and pump gas compatibility.

Crafted from a strong 2618 aluminum alloy, these pistons are well-suited for the demands of high-performance engines. The material choice offers good thermal expansion properties and the strength needed to withstand significant cylinder pressures. Each piston weighs in at 504 grams, a spec that helps maintain proper rotating assembly balance. The 1.304-inch compression height is critical for achieving the correct piston-to-deck clearance with your chosen crankshaft and rod combination, ensuring optimal combustion chamber volume and performance.

This set includes eight pistons, enough for a complete engine rebuild. 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 professional for specific installation requirements and compatibility with other engine components to achieve your desired performance goals.