BBM 440 F/T Piston Set 4.350 Bore -6cc

The BBM 440 F/T Piston Set 4.350 Bore -6cc from Sportsman Racing Products is a forged piston set engineered for high-performance marine and automotive applications. Built for the 440 Big Block Wedge engine platform, this eight-piece set delivers the durability and precision required in demanding marine environments where engine reliability directly impacts safety and performance on the water.

Each piston features a 4.350-inch bore with -6.00 cc compression characteristics, optimized for Mopar RB-series applications. The ring groove configuration—1/16 x 1/16 x 3/16 inch—is designed to maintain consistent ring seal and reduce blowby across the operating range, which is critical in marine engines that may experience sustained full-throttle conditions. The forged construction provides superior strength compared to cast alternatives, reducing the risk of piston failure under peak combustion pressures and thermal cycling inherent to marine powerplants.

This piston set is suited for serious marine engine rebuilds and performance upgrades where OEM or equivalent reliability is non-negotiable. Whether restoring a classic inboard powerhouse or upgrading an existing 440-based marine engine, this Sportsman Racing Products set delivers the dimensional accuracy and material quality needed for extended service life in saltwater and freshwater environments alike. The complete eight-piston set ensures uniform performance across all cylinders.

For engine builders and marine technicians, the BBM 440 F/T Piston Set represents a proven foundation for reliable, high-output marine power. Proper installation with compatible rings, connecting rods, and cylinder preparation is essential to maximize longevity and performance.