Mahle MS Piston Set GM LSX 402cid 4.000x1.110RCH 4.000 Stk 6.125 Rod .927 Pin -5.8cc 10.8CR Set of 8

This Mahle MS Piston Set gives you everything you need to rebuild the heart of your GM LSX engine for a 402 cubic inch displacement. Inside this set, you'll find eight forged pistons, complete with wrist pins and locks, ready to be installed. These pistons are specifically designed for performance applications, featuring a 4.000-inch bore and a 1.110-inch compression height, which works with a 4.000-inch stroke and a 6.125-inch connecting rod. The -5.8cc valve reliefs are designed to accommodate larger camshafts and provide a calculated 10.8:1 compression ratio with the specified components.

Mahle uses 2618 aluminum alloy for these pistons, a strong material known for its durability under high stress, making it a popular choice for serious engine builds. Each piston weighs in at 412 grams, contributing to a well-balanced rotating assembly. The 0.927-inch wrist pin diameter is standard for many performance LS applications. This set is engineered for builders looking to push the limits of their LSX engine, whether for track use or high-performance street driving. Remember, these pistons are not CARB approved and cannot be shipped to California.

When undertaking a performance engine build of this caliber, it's crucial to ensure all supporting components are up to the task. This includes appropriate connecting rods, crankshaft, camshaft, cylinder heads, and a robust valvetrain. Proper balancing of the rotating assembly is also highly recommended for optimal performance and longevity. Always refer to Mahle's installation guidelines for specific details regarding ring gap, piston-to-wall clearance, and assembly procedures.