Chevy BBC 454 6.385" 4.280" Bore 1.270" .990" Dome Top Forged Pistons and use low-resistance terminals for

and use low-resistance terminals for maximum conductivity

They include an alkyd distributor cap with brass terminal connections

to provide maximum performance

and they may be reduced to fit if you decide to narrow your rear-end later on

All Speedmaster 23deg

Chevy BBC 454 6.385" 4.280" Bore 1.270" .990" Dome Top Forged Pistons and use low-resistance terminals forSpeedmaster 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.