Edelbrock Rollin' Thunder camshafts are designed to improve horsepower and torque, produce a great sounding performance idle and provide excellent vacuum at idle to support power accessories. Rollin' Thunder camshafts feature more aggressive lift profiles than possible with conventional flat-tappet hydraulic cams, without excessive valve overlap that can compromise low rpm drivability; reduced friction provided by roller tappets makes this combination of accelerated valve lift and reduced duration possible. Edelbrock Rollin' Thunder camshafts are performance matched to Edelbrock Total Power Package components for proven performance. Edelbrock Rollin Thunder Camshaft 2263 Hydraulic - 1500-6500rpm - Adv. Duration 308 Intake/315 Exhaust - Valve Lift 0.629 Intake/0.643 Exhaust - Lobe Angle 112 Degree - 90 and Earlier Chevy Mark IV Big Block 500Proven PerformanceExtensive Dyno And Real World TestedFeature More Aggressive ProfilesWithout Excessive OverlapReduce FrictionIncreased PerformancePit Stop USAoffers Edelbrock Rollin Thunder Camshaft 2263 at low everyday prices. Be sure to check out all of the products from Edelbrock including Edelbrock Engine Parts and Accessories, Edelbrock Camshafts.