Mahle MS Piston Set SBM 408ci 4.030in Bore 4.00in Stroke 6.123in Rod .984 Pin -5cc 11.6 CR Set of 8

If you're building a high-performance Small Block Mopar engine, a solid set of pistons is where you start. This Mahle MS Piston Set is designed for the 408 cubic inch stroker combination, using a 4.030 inch bore and a 4.000 inch stroke. These pistons are forged from 4032 aluminum, which is a strong material known for its good thermal expansion properties, making it a popular choice for performance street and strip applications. They feature a -5.5cc dish volume, which, when paired with the right cylinder heads, helps achieve an 11.6:1 compression ratio. This compression level is well-suited for naturally aspirated engines running on premium pump gas, offering a notable increase in power and throttle response over stock configurations.

Mahle has included a 6.123 inch connecting rod length and a standard .984 inch wrist pin diameter, common sizes that make pairing with aftermarket or stock replacement connecting rods straightforward. The pistons themselves weigh in at 454 grams, which is a reasonable weight for a forged piston of this size, contributing to good engine balance. These are flat-top pistons, meaning they have a slight dish to help control compression and piston-to-head quench. This set includes all eight pistons needed for a V8 engine, ensuring you have a complete set for your build.

When installing these pistons, remember to follow the manufacturer's recommended clearances for bore hone, ring gap, and bearing setup. Proper assembly is key to unlocking the performance potential of these Mahle pistons and ensuring their longevity in your stroker engine. Please note that this piston set is not CARB approved and cannot be shipped to California.