Mahle MS Piston Set GM LS 347ci 3.905in Bore 3.622in Stk 6.125in Rod .927 Pin -4cc 10.1 CR Set of 8

Mahle is a well-known name in engine components, trusted by many builders for their reliable parts. This set of eight forged pistons is built for GM LS engines displacing 347 cubic inches. These pistons are designed for a 3.905-inch bore and feature a 3.622-inch stroke with a 6.125-inch connecting rod length. The included .927-inch pins are a common size for many performance LS builds.

Each piston has a -4.1cc dish volume, which helps achieve a 10.2:1 compression ratio when paired with appropriate cylinder heads and a 3.905-inch bore. This compression ratio is a popular target for naturally aspirated or mild forced induction builds, offering a good balance of power and pump gas compatibility. The pistons themselves are constructed from 4032 aluminum, a material known for its strength and thermal expansion properties, making them well-suited for performance applications. Each piston weighs in at 408 grams, contributing to a balanced rotating assembly.

This piston set is intended for engine rebuilding and performance applications. Please note that this part is not CARB approved and cannot be shipped to California. Always refer to manufacturer installation instructions for proper assembly and torque specifications.