Mahle MS Piston Set SBC 406ci 4.155in Bore 3.480/3.5stk 6.125in Rod .927 Pin -16cc 10.4 CR Set of 8

If you're building a performance Small Block Chevrolet (SBC) engine, this Mahle MS Piston Set is a solid choice for a 406 cubic inch application. These pistons are designed for a 4.155-inch bore and are intended to work with a 3.480 or 3.500-inch stroke crankshaft, paired with a 6.125-inch connecting rod. The set includes eight pistons, each featuring a .927-inch wrist pin and a -16cc dish volume. This dish volume, combined with the other engine components, results in a 10.4:1 compression ratio, making them suitable for a wide range of performance builds where pump gas is desired.

Mahle is known for well-built engine components, and these pistons are no exception. They are constructed from 4032 aluminum alloy, which offers a good balance of strength and lighter weight compared to cast iron. This alloy is also known for its good thermal expansion properties, which helps maintain proper piston-to-wall clearance throughout the engine's operating temperature range. The pistons weigh in at approximately 458 grams each, contributing to a well-balanced rotating assembly when properly matched with other components. The -16cc dish is a notable feature, providing the specific volume needed to achieve the target compression ratio with common SBC cylinder head volumes.

This set is designed for performance applications and is not CARB approved, meaning it cannot be shipped to California. It's important to ensure all rotating assembly components, including pistons, connecting rods, crankshaft, and harmonic balancer, are balanced by a professional machine shop before final assembly. This meticulous balancing is crucial for engine longevity and smooth operation, especially in higher-RPM performance engines.