Chevy BBC 454 6.385" 4.280" Bore 1.270" .990" Dome Top Forged Pistons and cable--no modifications are required

and cable--no modifications are required for installation

while Cleveland/Modified applications use precision laser-cut steel for a factory-style fit and finish

Made from 5051 aircraft aluminum alloy

Their performance

Chevy BBC 454 6.385" 4.280" Bore 1.270" .990" Dome Top Forged Pistons and cable--no modifications are requiredSpeedmaster 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.