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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 start to make awesome power around 3
The Speedmaster design incorporates open-fin spacing that promotes airflow through the radiator to enhance the cooling and help eliminate clogging
valve stem seals
the stock accessories may not run at the same speed as originally designed
Chevy BBC 454 1.940" STD 11/32" Stainless Steel Exhaust Valves Pop-Off plates are designed toWhen it's time for valves, don't cut corners. Get genuine Speedmaster stainless steel valves. They're made from a tough, stainless steel alloy and are carefully designed to increase gas flow for more power. What's more, they have hardened stem tips for durability and are swirl polished.
