Chevy BBC 454 6.385" 4.250" Bore 1.270" .990" Dome Top Forged Pistons These kits are specifically designed

These kits are specifically designed to deliver the performance you want

This construction ensures superior strength

Speedmaster flexplates make excellent upgrades to your stock design

Manufactured with lightweight aluminum technology

The key to a cooler and longer-lasting transmission is simple Speedmaster dual pass transmission coolers

Chevy BBC 454 6.385" 4.250" Bore 1.270" .990" Dome Top Forged Pistons These kits are specifically designedSpeedmaster 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.