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12-point head design and a larger-than-stock shank diameter
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
They work under the same principals as OEM tanks
Speedmaster has already done the work for you
Chevy SBC 350 1 5/8" Block Hugger Stainless Steel Exhaust Headers (Angle Plug Heads) 12-point head design and a
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