Chevy BBC 454 1.940" STD 11/32" Stainless Steel Exhaust Valves They come in tall and

They come in tall and short models

Speedmaster Twin-Carb combine two four-barrel carburetors to achieve the best balance of drivability

As the horsepower in your performance vehicle goes up so does the strength of the read end housing

Speedmaster stud girdles will tie your studs together

Chevy BBC 454 1.940" STD 11/32" Stainless Steel Exhaust Valves They come in tall andWhen 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.