Mahle MS Piston Set GM 604 353ci 4.02in Bore 3.48in Stk 5.7in Rod 0.927 Pin -5cc 10.5 CR Set of 8

If you're rebuilding a GM 604 Crate Engine or looking for a robust replacement for your 353 cubic inch Small Block Chevrolet, this Mahle MS Piston Set is a solid choice. These pistons are designed as a direct, press-fit replacement, meaning they're built to work with your existing connecting rods and crankshaft without needing extensive modifications. They're crafted from forged aluminum, which is significantly stronger and more durable than cast aluminum, making them ideal for engines that see regular use or are built for performance.

This set is engineered to achieve a 10.5:1 compression ratio with a 3.48-inch stroke and a 5.7-inch connecting rod, featuring a -5cc dish volume. The 4.020-inch bore size is standard for many 353 cubic inch builds. Each piston weighs in at 557 grams, and they utilize a 0.927-inch pin diameter, a common size for these applications. The 4032 aluminum alloy used offers good thermal expansion properties, which helps maintain piston-to-wall clearance as the engine heats up, contributing to a quieter operation and longer life.

This set includes pistons for all eight cylinders, ensuring a complete engine overhaul. Remember 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.