Edelbrock Rollin? Thunder Camshaft # 2210 is designed for small-block Chevy engines from 1957-86 and produce optimum torque from the low-end to the mid-range. Rollin? Thunder camshafts should be matched 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. This cam produced 440HP and 425 Ft Lbs of Torque when paired with Pro-Flo XT EFI system # 3528 and RPM E-Tec cylinder heads # 60975. Must be used with thrust button, high stall torque converter, and stock ratio rocker arms only. Camshaft specifications: ? Intake duration: 262 Degrees ? Exhaust duration: 266 Degrees ? Intake lift: .628? ? Exhaust lift: .608? ? Lobe separation: 114 Degree ? Intake Center Line: 109 Degree ? Vacuum: 13"