Mahle MS Piston Set GM LS 408ci 4.030in Bore 4in Stroke 6.125in Rod .927 Pin -12cc 10.6 CR Set of 8

Mahle MS Piston Set for GM LS 408ci engines. This set is built for a 4.030 inch bore and a 4.000 inch stroke, utilizing a 6.125 inch rod with a .927 inch pin. The pistons feature a -12cc dish volume, contributing to a 10.6:1 compression ratio with 4032 aluminum construction. These pistons are designed for builders looking to assemble a robust 408 cubic inch LS engine, offering a solid foundation for performance builds.

Constructed from 4032 aluminum, these pistons are well-suited for high-performance applications. This material offers good thermal expansion properties, making it a popular choice for naturally aspirated and forced induction builds where reliability and durability are key. Each piston weighs in at 421 grams, contributing to a balanced rotating assembly. The -12cc dish volume is specifically designed to achieve a 10.6:1 compression ratio when paired with the correct cylinder head volume and a 4-inch stroke crankshaft in an LS engine. This compression ratio is a well-regarded target for many performance LS builds, offering a good balance between pump gas drivability and power potential.

This set includes eight pistons, enough for a complete V8 engine. Please note that this piston set is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.