Mahle MS Piston Set Chevy SB 405ci 4.145in Bore 3.5/3.75 Stroke 6.125/6 Rod .927 Pin 9cc 13.0/13.9CR

Forged from 2618 aluminum, this Mahle piston set is built for serious performance in your Chevrolet Small Block 405 cubic inch engine. The 4.145-inch bore size is specific, and the 9.0cc valve relief volume is designed to work with your cylinder head choice, targeting a compression ratio of 13.0:1 with a 3.5-inch stroke and 6.125-inch rod, or 13.9:1 with a 3.75-inch stroke and 6.0-inch rod. These pistons are designed to handle the stresses of higher compression and performance camshafts, making them a solid choice for a performance rebuild.

Each piston weighs in at 454 grams, contributing to a well-balanced rotating assembly when paired with appropriate connecting rods and a crankshaft. The 0.927-inch pin diameter is standard for many performance applications, ensuring a strong connection between the piston and connecting rod. Mahle's expertise in piston manufacturing means you're getting a well-built component that's ready for the demands of a performance engine build. Remember that these pistons are not CARB approved and cannot be shipped to California.

When building a high-performance engine, attention to detail is key. This piston set is a critical piece of that puzzle, designed to work with specific stroke and rod lengths to achieve your desired compression ratio. Ensure you have the correct connecting rods (6.125-inch or 6.0-inch) and crankshaft (3.5-inch or 3.75-inch stroke) to match the intended application of these pistons. Proper balancing of the entire rotating assembly is also recommended for optimal engine health and performance.