Mahle MS Piston Set SBC 420ci 4.155in Bore 3.875in Stroke 6.0in Rod .927 Pin -5cc 12.0 CR Set of 8

If you're building a high-performance Chevrolet Small Block engine, this Mahle MS Piston Set is a solid option for your 420 cubic inch application. Mahle is a well-known name in engine components, and these pistons are designed to handle the demands of a performance build. They feature a 4.155-inch bore and are designed to work with a 3.875-inch stroke crankshaft and a 6.0-inch connecting rod, giving you a complete package for your engine's bottom end.

These pistons are forged from 4032 aluminum, which is a strong material that offers good thermal expansion properties, making them suitable for performance applications where temperatures can get high. The -5cc dish volume combined with the other specified dimensions results in a 12.0 compression ratio, which is a popular choice for naturally aspirated or forced induction builds looking for a noticeable increase in power. The pistons come with a .927-inch pin diameter and weigh in at 429 grams each, ensuring a balanced rotating assembly when you install all eight.

When rebuilding your engine, using a matched set of pistons from a reputable manufacturer like Mahle is crucial for proper balance and performance. This set includes all eight pistons needed for a V8 engine. Please note that these pistons are not CARB approved and cannot be shipped to California. Always refer to your engine builder's recommendations and torque specifications during installation to ensure optimal results and longevity.