Mahle MS Piston Set SBC 420ci 4.155in Bore 3.875in Stroke 6.0in Rod .927 Pin -22cc 10.0 CR Set of 8

Mahle is a well-known name in engine components, recognized for their commitment to precision and performance. This Mahle MS Piston Set is built for serious engine builders working on a Chevrolet Small Block 420 cubic inch application. These pistons are designed to handle the demands of a performance-oriented build, offering a solid foundation for your engine’s top end.

This set features a 4.155-inch bore and is designed to work with a 3.875-inch stroke and a 6.0-inch connecting rod, utilizing a .927-inch pin. The pistons are forged from 4032 aluminum, a material chosen for its strength and thermal expansion properties, which helps maintain consistent piston-to-wall clearance during operation. With a -22cc valve relief, these pistons are intended to achieve a 10.0:1 compression ratio when paired with appropriate cylinder heads, making them a popular choice for naturally aspirated or forced induction builds seeking improved power output. Each piston weighs in at approximately 447 grams, contributing to a well-balanced rotating assembly.

When rebuilding or modifying your engine, using well-built components like these Mahle pistons is crucial for reliability and performance. Please note that this piston set is not CARB approved and cannot be shipped to California. Always refer to manufacturer instructions for proper installation and compatibility with other engine components.