Edelbrock Rollin' Thunder Camshaft #2206 is designed for 383-400-440 Chrysler V8 engines and produces 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 571HP and 523 Ft Lbs of Torque when paired with Pro-Flo XT EFI system #3544 Performer RPM cylinder heads #60925 and Edelbrock roller tappet lifter set #97483. Must use included bronze distributor gear failure to do so could result in engine failure. Camshaft utilizes three bolt configuration. Must use with high stall torque converter only. Camshaft specifications: - Intake duration: 240 Degrees - Exhaust duration: 248 Degrees - Intake lift: .540" - Exhaust lift: .545" - Lobe separation: 112 Degree - Intake Center Line: 107 Degree - Vacuum: 10"