Mahle MS Piston Set GM LS 363ci 3.800in Bore 4in Stroke 6.125in Rod .927 Pin -4cc 11.1 CR Set of 8

Mahle's MS Piston Set is built for GM LS engines, specifically targeting builds around the 363 cubic inch displacement. These pistons feature a 3.800-inch bore and are designed to work with a 4-inch stroke crankshaft, giving you a solid foundation for a performance engine build. The -4cc dome volume, combined with the specific chamber volume of LS1/2/6 style cathedral port heads, results in an 11.1:1 compression ratio, which is a popular choice for naturally aspirated builds looking for a good balance of power and pump gas compatibility.

Constructed from 4032 aluminum alloy, these pistons are well-suited for high-performance applications. This material offers a good combination of strength and lighter weight compared to cast aluminum, and it has a lower expansion rate, which can lead to tighter piston-to-wall clearances and quieter operation. The pistons come with a 0.927-inch pin diameter, a standard size for many performance connecting rods, and a 6.125-inch rod length, which is common in many LS engine configurations. Each piston weighs in at 391 grams, helping to keep reciprocating assembly weight manageable.

This set includes eight pistons, ready for your next engine assembly. Please 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.