Mahle MS Piston Set GM LS 378ci 4.075in Bore 3.622in Stk 6.125in Rod .927 Pin 12cc 12.3 CR Set of 8

If you're building a high-performance GM LS engine, this Mahle MS Piston Set is a solid choice for your 378 cubic inch application. Mahle is a well-known name in engine components, and this set is built for demanding builds where reliability and performance are key. These pistons are designed to work with a 4.075-inch bore and a 3.622-inch stroke, fitting a 6.125-inch connecting rod with a .927-inch pin. The 12cc dish volume contributes to a 12.3:1 compression ratio, which is ideal for naturally aspirated or forced induction setups looking for significant power gains.

Crafted from 2618 aluminum, these pistons are known for their strength and durability under high stress. Each piston weighs in at approximately 494 grams, balancing strength with reasonable reciprocating mass for improved engine response. The design accounts for a 1.304-inch compression height, ensuring proper piston-to-deck clearance when used with the specified stroke and rod length. This set includes all eight pistons needed for a complete engine build, making it a convenient option for your project.

When installing these pistons, it's important to follow Mahle's specific installation guidelines to ensure optimal performance and longevity. Remember that this piston set is not CARB approved and cannot be shipped to California. Always consult your engine builder or a professional mechanic to confirm compatibility with your specific engine configuration and other components.