Chevy 400 427 Ford 351W Windsor 4.185" 1.015" Dished -16cc Forged Pistons these adjusters provide 190

these adjusters provide 190

Their strong die-cast aluminum design ensures an excellent gasket seal and dissipates heat better than many other covers

Pop-Off plates are designed to release the high pressure that builds up inside of the engine to prevent damaging or cracking your supercharger components

The air flowing under the plenum provides a cooler charge for the incoming air with less heat transfer from the engine

Although the GM heads are good pieces

Chevy 400 427 Ford 351W Windsor 4.185" 1.015" Dished -16cc Forged Pistons these adjusters provide 190Speedmaster 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.