Mahle MS Piston Set GM LSX 366cid 4.010x1.330CH 3.622 Stk 6.098 Rod .945 Pin -5.8cc 9.9CR - Set of 8

When you're building or rebuilding a performance GM LSX engine, getting the right pistons is crucial. This set from Mahle gives you eight forged pistons, complete with wrist pins and locks, designed for a 366 cubic inch displacement. These aren't just any pistons; they're built to handle the demands of a high-performance engine, ensuring reliable power delivery and durability.

Mahle uses 2618 aluminum for these pistons, a strong and well-known material for forged pistons that offers excellent thermal stability and resistance to detonation. Each piston has a 4.010-inch bore and a 1.330-inch compression height, which works with a 3.622-inch stock stroke crankshaft and a 6.098-inch connecting rod to achieve a 9.9:1 compression ratio with a -5.8cc valve relief. This specific compression ratio is a solid choice for many naturally aspirated or forced induction builds, offering a good balance of power and pump gas compatibility. Each piston weighs in at 444 grams, which is consistent for a set of this caliber, helping to keep your rotating assembly balanced.

This set is intended for serious engine builds and requires professional installation. It's important to note that these pistons are not CARB approved and cannot be shipped to California. Always refer to Mahle's detailed installation instructions to ensure proper fitment and assembly for your specific engine build.