Mahle MS Piston Set GM LT1 427ci 4.125in Bore 4in Stk 6.125in Rod .927 Pin -6cc 12.3 CR Set of 8

This Mahle MS Piston Set is designed for GM LT1 engines, specifically for builds aiming for a 427 cubic inch displacement with a 4.125 inch bore and a 4.000 inch stroke. You get a complete set of 8 forged pistons, ready to be installed with 6.125 inch connecting rods and a .927 inch wrist pin. These pistons feature a -6.1cc dish volume, which helps achieve a 12.7:1 compression ratio when paired with compatible LT1, L86, or LT4 cylinder heads.

Mahle builds these pistons from 2618 aluminum, a strong and well-known alloy for high-performance applications. This material choice is crucial for handling the increased cylinder pressures and temperatures found in modified or performance-oriented engines. Each piston weighs in at approximately 455 grams, contributing to a balanced rotating assembly. The 4.125 inch bore size is a common upgrade for increasing displacement, and these pistons are precisely machined to fit that specification, ensuring a proper seal and efficient combustion.

This set is intended for engine builders looking to significantly upgrade their GM LT1 engine's internal components. 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.