BBM Dished Piston Set 4.350 Bore -26.7cc

The ICON PISTONS BBM Dished Piston Set 4.350 Bore -26.7cc is a premium forged piston solution engineered for serious big-block Mopar RB-series engine builds. This complete set of eight pistons delivers the precision geometry and material integrity required for high-performance street, strip, and competition applications where reliability under sustained load is non-negotiable.

Specified for 4.350-inch bore engines, these dished pistons feature a -26.7cc bowl volume designed to optimize compression geometry and combustion efficiency in RB-series configurations. The 1/16 x 1/16 x 3/16-inch ring groove dimensions accommodate standard ring packages while the forged construction resists detonation stress and thermal cycling common to boosted or nitrous-oxide applications. The dished crown geometry allows tuners to dial in compression ratios for specific fuel octane ratings and boost levels without requiring custom head work. Each piston undergoes precision finishing to ensure consistent bore fit and minimize ring blow-by across all eight cylinders.

This piston set is the preferred choice for Mopar big-block engine builders rebuilding or upgrading 440, 413, or 400 platforms. Serious enthusiasts performing stroker conversions, increasing displacement, or adding forced induction rely on ICON's forged piston technology to maintain engine durability. Whether building a resto-mod, bracket racing engine, or street performer, the consistent bore fit and thermal stability of forged construction delivers the reliability that aftermarket power demands.