Mahle MS Piston Set GM LS 383ci 3.905in Bore 4in Stroke 6.125in Rod .927 Pin -26cc 8.9 CR Set of 8

Mahle is a well-known name in engine components, recognized for their commitment to quality and performance. This MS Piston Set is built for GM LS engines, specifically for a 383 cubic inch displacement, offering a solid foundation for a performance build. If you're assembling or rebuilding a high-performance LS engine, these pistons are designed to handle the demands of increased power and stress.

This set includes eight pistons, each crafted from 2618 aluminum, a material chosen for its strength and ability to withstand high temperatures and pressures common in performance applications. The pistons feature a 3.905-inch bore and are designed to work with a 4-inch stroke crankshaft and a 6.125-inch connecting rod. The -26cc dish volume contributes to an 8.9:1 compression ratio when paired with the appropriate cylinder heads and gasket combination, making it suitable for naturally aspirated or forced induction setups where controlled compression is key. The .927-inch pin diameter is standard for many performance LS applications.

When installing these pistons, ensure you follow precise machining and assembly procedures. The 2618 aluminum construction requires careful attention to piston-to-wall clearance and ring gap settings to ensure optimal performance and longevity. This set is intended for competition or off-road use and is not CARB approved, meaning it cannot be legally shipped to California. Always refer to Mahle's installation guidelines for detailed specifications and recommendations.