comp cams camshaft, xtreme 4x4, hydraulic flat, advertised duration 254/262, lift .505/.505, for chevrolet big block 396-454, each

COMP Cams Xtreme Energy 4x4 camshafts are built to take advantage of the latest cam technology to provide maximum performance and low-end torque for your vehicle. Whether your use is off-roading or towing, there is an Xtreme 4x4 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.