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 RPM Roller Camshaft 2261 Hyd - 1500-6500rpm - Adv Dur 335 Intake/329 Exhaust - Valve Lift 0.625 Intake/0.639 Exhaust - Lobe Angle 112deg - 396-502 Chevy V8 - Use Stock Ratio Rocker Arms OnlyDesigned for 1500 to 6500 PerformanceMaximum Power in High-RPM with Good Low-End TorqueMatched to Edelbrock Performer RPM Intakes10 to 12 in. of Manifold Vacuum at IdleMore Lift and Duration than Most Street CamshaftsDyno Matched/Street Proven PerformanceTake the Guesswork Out of Camshaft Selection!Use Only Stock Ratio Rocker ArmsPit Stop USAoffers Edelbrock RPM Roller Camshaft 2261 at low everyday prices. Be sure to check out all of the products from Edelbrock including Edelbrock Engine Parts and Accessories, Edelbrock Camshafts.