The camshaft plays an important role in opening and closing valves to enable fuel and air into the combustion chamber of your vehicle. If you are experiencing hesitation with a loss of power, jerking or shaking, more fuel consumption, or producing more emissions than usual, it could be time for a replacement. Intake and Exhaust Camshaft from Hot Cams are offered in 3 stages, with stage 1 cams offering more pulling power, stage 2 cams supplying more horsepower, and stage 3 cams providing the ultimate in rpm horsepower and over rep. Camshafts from Hot Cams are offered as a set of both intake and exhaust cams or are available separately with detailed instructions for simple and easy installation.