Chevy 400 427 Ford 351W Windsor 4.165" 1.015" Dished -16cc Forged Pistons and large HEIs or DuraSparks

and large HEIs or DuraSparks

or larger wheels to clear them

If you're completing the installation of a Speedmaster electric water pump

Speedmaster flexplates will withstand the extreme power and rpm of today's engines

Chevy 400 427 Ford 351W Windsor 4.165" 1.015" Dished -16cc Forged Pistons and large HEIs or DuraSparksSpeedmaster 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.