SBM Domed Piston Set 3.940 Bore +6cc

The KB PERFORMANCE PISTONS SBM Domed Piston Set 3.940 Bore +6cc is a precision-engineered solution designed for small-block engine builders and performance mechanics. This piston set is ideal for those looking to increase compression ratios and optimize combustion chamber performance, whether for street use or racing applications.

Crafted from forged aluminum, these pistons feature a domed crown geometry that enhances volumetric efficiency and flame-front propagation during combustion. The +6cc dome volume allows for fine-tuning of effective compression ratios when paired with specific cylinder head and block combinations, ensuring optimal performance.

This piston set is particularly beneficial for hot rodders, circle-track racers, and street performance enthusiasts who are rebuilding small-block engines for enhanced displacement or compression. Each piston undergoes rigorous quality control to ensure consistent weight and balance, which is crucial for maintaining crankshaft equilibrium and reducing vibration.