Chevy BBC 454 6.385" 4.350" Bore 1.270" .990" Dome Top Forged Pistons you get reduced wear on

you get reduced wear on the main bearings and timing gear

a C5 Corvette hub bearing pack

while giving accurate measurements on your oil capacity

wall thickness and are formed from 4130 chromoly steel

heat-treated to a maximum strength of 190

Chevy BBC 454 6.385" 4.350" Bore 1.270" .990" Dome Top Forged Pistons you get reduced wear onSpeedmaster 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.