SBM Flat Top Piston Set 4.030 Bore -5cc

The SBM Flat Top Piston Set 4.030 Bore -5cc from Sportsman Racing Products is designed for high-performance small block marine engines, making it an ideal choice for serious boaters and marine engine builders. This piston set provides the reliability needed in both saltwater and freshwater applications, ensuring optimal performance when pushing a boat to its limits.

Featuring a flat-top design, these pistons reduce compression chamber volume, optimizing combustion efficiency with the -5cc displacement specification. The precisely manufactured 4.030-inch bore size ensures a zero-tolerance fit within the cylinder block, which helps prevent blowby and maximizes power transfer during acceleration and sustained high-RPM operation.

Marine engine rebuilders, professional boat mechanics, and experienced anglers upgrading worn or damaged powerplants will find this piston set essential for achieving OEM-equivalent or upgraded engine builds. Proper installation requires matching these pistons with compatible rods, rings, and gasket sets specific to small block marine engines.