Edelbrock Performer-Plus Camshaft #2117 is designed for 283-400 Chevy V8 engines from 1957-86 and produce optimum torque from the low-end to the mid-range. Performer-Plus camshafts should be matched with Performer manifolds for vehicles operating from off-idle to 5500 rpm. The Performer-Plus #2117 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. This cam produced 338 HP and 389 Ft Lbs of Torque when paired with Performer EPS intake manifold #2701 E-Street cylinder heads #5089 and E-Street EFI system #3664. Camshaft specifications: - Intake duration: 218 Degrees - Exhaust duration: 224 Degrees - Intake lift: .464" - Exhaust lift: .470" - Lobe separation: 114 Degree - Intake Center Line: 110 Degree - Vacuum: 15"