Chevy BBC 454 6.385" 4.280" Bore 1.270" .990" Dome Top Forged Pistons The Speedmaster Exhaust Gasket sets

The Speedmaster Exhaust Gasket sets are designed for high-performance sealing and durability

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

These scoops give you that classic Hilborn-style look with a polished aluminum body

Made from 5051 aircraft aluminum alloy

and cable--no modifications are required for installation

Chevy BBC 454 6.385" 4.280" Bore 1.270" .990" Dome Top Forged Pistons The Speedmaster Exhaust Gasket setsSpeedmaster 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.