Mahle MS Piston Set BBC 505ci 4.350in Bore 4.25in Stroke 6.385in Rod .990 Pin 18cc 10.4 CR Set of 8

If you're building a high-performance Big Block Chevy engine, this Mahle MS Piston Set is a solid choice for your 505 cubic inch application. These pistons are designed for a standard deck height of 9.800 inches and feature a 4.350-inch bore, working with a 4.250-inch stroke and a 6.385-inch connecting rod. The set includes eight pistons, each weighing 556 grams, and they come with a .990-inch pin diameter.

Mahle has engineered these pistons with an 18cc dome volume, which, when paired with the specified bore and stroke, results in a 10.4:1 compression ratio. This compression level is well-suited for performance builds where you want a noticeable increase in power without going to an extreme that requires specialized fuel. The pistons are constructed from 4032 aluminum, a material known for its strength and resistance to expansion, making it a reliable choice for demanding engine builds. This material helps ensure durability and consistent performance under high heat and stress.

This set is intended for performance engine builds and is not CARB approved, meaning it cannot be shipped to California. Please ensure your engine build specifications align with these components before ordering. For a complete engine build, consider pairing these pistons with appropriate rings, connecting rods, and a camshaft that complements the 10.4:1 compression ratio.