Mahle MS Piston Set SBC 400ci 4.125in Bore 3.750in Stroke 5.7in Rod .927 Pin -5cc 11.5 CR Set of 8

If you're rebuilding a Chevrolet Small Block 400 cubic inch engine and looking for a solid set of pistons to handle increased performance, this Mahle MS Piston Set is a strong contender. These pistons are designed for a 4.125 inch bore and use a 3.750 inch stroke with a 5.700 inch rod, aiming for an 11.5:1 compression ratio with their -5cc dish volume. Mahle is a well-known name in engine components, and this set is built with 4032 aluminum, a material often chosen for its good expansion characteristics and durability in performance applications.

Each piston in this set weighs in at 476 grams, which is a notable weight for a forged piston of this size. The .927 inch pin diameter is standard for many performance Small Block Chevy applications. Forged pistons like these are generally more robust than cast pistons, offering better resistance to detonation and the stresses of higher compression and more aggressive camshaft profiles. This set includes all eight pistons needed for a V8 engine, making it a comprehensive solution for your engine build.

Keep in mind that these pistons are not CARB approved and cannot be shipped to California due to emissions regulations. Also, be aware of the Prop 65 warning associated with this product. When planning your build, consider that achieving the target compression ratio will depend on your specific cylinder head volume and head gasket thickness.