SBF Flat Top Piston Set 4.040 Bore -6.5cc

The SBF Flat Top Piston Set 4.040 Bore -6.5cc from KB Performance Pistons is designed for serious small-block Ford engine builders who prioritize precision and durability in high-performance applications. These flat-top pistons are engineered for enthusiasts and professional mechanics who require tight tolerances and consistent ring seal in modified engines, particularly those running elevated boost or nitrous.

Manufactured using advanced aluminum alloy formulations and precision-forged construction, these pistons are built to withstand high combustion pressures and thermal cycling. The -6.5cc dome refers to the volume of the piston dome, which creates a lower, flatter crown profile that reduces quench distance and improves flame propagation in the combustion chamber, enhancing performance in tight-deck applications.

These pistons are ideal for street/strip small-block Ford builds, including 302, 347, 363, and other bored-over variants where compression ratio tuning and clearance management are critical. Proper installation requires honing to ensure optimal performance and compatibility with various engine setups.