Bracket race 468-496c.i. heavy car, 12:1+ compression. 4,800-7200 RPM Operating Range 270/280 Duration at .050". 110 Degree Lobe Separation Angle 0.714/0.710 Valve Lift Strip Ready - COMP Cams Drag Race series was developed to propel your drag car to the finish line first. Including more aggressive lobe designs, Drag Race grinds deliver exceptional power for every application. N/A, Nitrous, Blower and Turbo - Regardless of the build, COMP's Drag Race line has a camshaft for your engine. With grinds for naturally aspirated, blown, turbo and nitrous engines, the Drag Race series was developed for the most common drag race engine combinations out there. Fits Chevrolet 396-454 Mark IV Big Block Made in USA