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. They are smooth idling cams 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. 3 our most popular Performer-Plus camshafts for small-block Chevys are 50-state street legal. Edelbrock Performer-Plus Camshaft Kit 2152 Olds 400-455 - Hydraulic - Off-Idle-5500rpm - Adv. Duration 288 Degree Int./298 Degree Exhaust - Valve Lift 0.472 Int./0.496 ExhaustDesigned for Optimum Torque and AccelerationMaximum Performance From Idle through Mid-RangeMatched to Edelbrock Performer IntakesIncludes Hydraulic Lifters and Assembly LubeMajor Improvement in Throttle Response and TorqueUse For Daily Drivers/Trucks/Vans/RVs/4x4sTake The Guesswork Out Of Camshaft SelectionPit Stop USAoffers Edelbrock Performer-Plus Camshaft Kit 2152 at low everyday prices. Be sure to check out all of the products from Edelbrock including Edelbrock Engine Parts and Accessories, Edelbrock Camshafts and Lifter Kits, Edelbrock Hydraulic Cam and Lifter Kits - Olds V8.