Chevy BBC 454 6.385" 4.500" Bore 1.270" .990" Dome Top Forged Pistons ductile iron top rings that

ductile iron top rings that seal against blow-by when the piston rocks in its bore

heat-treated to the highest Rockwell hardness available

We offer the best in differential components including this differential side adjusters

The OEM replacements get harder to find as time goes on

Try a set of these Speedmaster finned aluminum valve covers

Chevy BBC 454 6.385" 4.500" Bore 1.270" .990" Dome Top Forged Pistons ductile iron top rings thatSpeedmaster Forged pistons are made from 4032 aluminum alloy for quieter operation and reduced piston to wall clearance. Up to 20% lighter than traditional forged pistons that eliminate harmful stress concentrations for superior strength. Specifically designed for naturally aspirated or moderate nitrous applications.