Chevy SBC 350 Hydraulic Roller Camshaft 248 Int. 254 Exh. Duration They're roll-threaded

They're roll-threaded

Whether you're rebuilding a stock engine or changing to valve springs that have more seat pressure

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

There's no better way to top off your street machine than with one of our PCEHilborn-Style hood scoops

making it a strong upgrade for performance builds

Chevy SBC 350 Hydraulic Roller Camshaft 248 Int. 254 Exh. Duration They're roll-threadedSpeedmaster camshafts are built to take advantage of the latest cam technology, to provide maximum performance. Whether your use is off roading, towing, or street performance, there is a Speedmaster cam available for you. By using an aggressive lobe profile, these cams provide better throttle response and more top end horsepower than equivalent cams from other manufacturers, while delivering increased engine vacuum.