The Edelbrock Performer-Plus #2157 is designed for optimum torque from the low-end to the mid-range, Performer-Plus camshafts match with Performer manifolds for vehicles operating from off-idle to 5500 rpm. The Performer-Plus #2157 is a smooth idling cam for daily drivers, trucks, vans, RVs and 4x4s. You can expect a major improvement in throttle response and torque. In the manifold section you'll find torque graphs showing the power gains from Performer manifolds and Performer-Plus cams. All camshafts include flat tappet lifters (except for cams designed for use with stock roller lifters), assembly lube and instructions.Installation Notes: • Designed for Pontiac, 350-403, V8 • Produces 387 HP & 439 ft.-lbs. when matched with #2156 intake & #60599 heads.