BBM Dished Piston Set 4.350 Bore -26.7cc

The ICON PISTONS BBM Dished Piston Set 4.350 Bore -26.7cc is a professional-grade internal engine upgrade designed for serious builders and high-performance enthusiasts working on big-block Mopar platforms. These dished pistons are specifically engineered to lower compression ratios while maintaining structural integrity under extreme combustion loads, making them suitable for various applications, including forced induction and nitrous oxide systems.

The -26.7cc dish geometry effectively reduces combustion chamber volume, which helps lower the static compression ratio to protect against knock and preignition. ICON's manufacturing process ensures precision and durability, delivering consistent concentricity and weight across all cylinders, which is critical for balanced crankshaft dynamics and reduced vibration at high RPM.

This piston set is ideal for builders preparing 440, 455, or similar displacement Mopar engines, particularly those looking to enhance performance with careful tuning. The 4.350-inch bore diameter accommodates big-block engine platforms with strict overbore tolerances, while the dished crown design optimizes quench clearance and flame propagation for efficient combustion.