Mahle MS Piston Set GM LSX 403cid 4.005x1.110RCH 4.000 Stk 6.125 Rod .927 Pin -5.8cc 10.8CR Set of 8

If you're building a performance GM LSX engine and need a solid set of pistons to handle increased power, this Mahle MS Piston Set is a strong contender. These are designed for a 403 cubic inch displacement, which is a popular size for LS swaps and performance builds. The pistons themselves are forged from 2618 aluminum, a material known for its strength and ability to withstand high temperatures and pressures, making them a reliable choice for boosted or high-compression applications.

This set features a 4.005-inch bore size, a 4.000-inch stroke compatibility, and a 6.125-inch rod length. The dish volume is -5.8cc, which, when combined with the specified cylinder head volume, results in a 10.8:1 compression ratio. This compression level is well-suited for naturally aspirated builds aiming for good power output, or for use with forced induction where careful tuning is applied. Each piston weighs in at 414 grams, contributing to a balanced rotating assembly. The pin diameter is 0.927 inches, a common size for performance LS applications.

This set includes pistons for a complete 8-cylinder engine. It's important to note that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures, especially when dealing with critical engine components like pistons.