Mahle MS Piston Set SBC 427ci 4.125in Bore 4.000in Stroke 6.0in Rod 0.927 Pin 4cc 13.7 CR Set of 8

If you're building a high-performance Chevrolet Small Block engine, this Mahle MS Piston Set is a solid choice for your 427 cubic inch application. Mahle is a well-known name in engine components, and this set is designed for serious builds that demand reliable performance. These pistons are specifically made for a 4.125-inch bore and a 4.000-inch stroke, which is a common combination for creating a 427 cubic inch displacement from a Small Block Chevy. They also feature a 6.0-inch rod length compatibility and a 0.927-inch pin diameter, ensuring they integrate well with many popular performance connecting rods and wrist pins.

What sets these pistons apart is their construction and the resulting compression ratio. Made from 2618 aluminum, a material known for its strength and ability to handle high temperatures and pressures, these pistons are built to last in demanding conditions. They have a 4cc dish volume and contribute to a 13.7:1 compression ratio when paired with the right cylinder heads and gasket combination. This high compression ratio is ideal for naturally aspirated engines looking to maximize power output, especially when using high-octane fuel. Each piston weighs in at 449 grams, which is a reasonable weight for a forged piston of this size, helping to keep reciprocating assembly balance in check.

This set includes eight pistons, enough for a complete V8 engine. It's important to note that these pistons are not CARB approved and cannot be shipped to California due to emissions regulations. Additionally, they are subject to Prop 65 warnings. When installing these, ensure you follow the manufacturer's recommended clearances and lubrication procedures for optimal performance and longevity. This set is a great foundation for a powerful street or track engine build.