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Speedmaster Steel main girdles are machined from 1045 steel
The oil pan helps to cool the oil thru its contact with the outside air
They provide higher power and torque transmission
drag race and any other professional or sportsman racing applications
That means you get more airflow headed down the carburetor or throttle body and into the combustion chamber
Chevy 400 427 Ford 351W Windsor 4.125" 1.015" Dished -16cc Forged Pistons Speedmaster Steel main girdles areSpeedmaster 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.
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