Chevy 400 427 Ford 351W Windsor 4.125" 1.015" Dished -16cc Forged Pistons drag race and any other

drag race and any other professional or sportsman racing applications

or choke control to restrict airflow

Speedmaster Steel main girdles are machined from 1045 steel

and a 1:1 fuel pressure rise from the boost reference port

8" and 9" rear ends

Chevy 400 427 Ford 351W Windsor 4.125" 1.015" Dished -16cc Forged Pistons drag race and any otherSpeedmaster 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.