BBM Left Single Piston 4.375 Bore - Dished

The BBM Left Single Piston 4.375 Bore - Dished from ICON PISTONS is a precision-engineered piston assembly designed for high-performance small-block engine builds where consistent combustion chamber geometry is critical. This left-bank piston serves applications requiring exact bore specifications and optimized dome design, making it essential for builders and mechanics pursuing maximum reliability and efficiency in competitive powerplants.

The dished crown configuration reduces compression height while improving fuel economy and thermal management. Engineered to ICON's exacting tolerances, this single piston features a 4.375-inch bore diameter matched to a dished crown that controls peak pressures and promotes uniform ring seating across the stroke cycle. The design is particularly beneficial for applications running pump gasoline or reduced octane fuel loads.

Weighing 1.85 lbs, the piston meets strict mass specifications for balanced rotating assemblies, preventing harmonic imbalances that degrade throttle response and fuel consumption. Technicians and builders will appreciate the concentricity and surface finish that minimize blow-by and extend ring life, critical factors when field service intervals or logistics restrict frequent teardowns.