K12-601-4 287 Tooth Mutha Thumpr Hydraulic Flat Tappet Camshaft Kit for 1977-1980 Small Block Chevy

Compcams is the absolute leader in valve train technology as we provide the highest-performing products possible with superior service and lead the industry in technological development. We take utmost initiative to offer high performance and reliable products. Everything in your valve train is part of a complex interlocking system that needs to perform well. Compatibility -1977-1980 Small Block Chevy Specifications - Outside Diameter of Outer Spring: 1.254in - Lifter Style: Hydraulic Flat Tappet - Timing Chain Style: Double roller - Camshaft Gear Attachment: 3-bolt - Cam Style: Hydraulic flat tappet - Basic Operating RPM Range: 2 200-6 100 - Intake Duration at 050 inch Lift: 235 - Exhaust Duration at 050 inch Lift: 249 - Duration at 050 inch Lift: 235 int./249 exh. - Advertised Intake Duration: 287 - Advertised Exhaust Duration: 305 - Advertised Duration: 287 int./305 exh. - Intake Valve Lift with Factory Rocker Arm Ratio: 0.489in - Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.476in - Valve Lift with Factory Rocker Arm Ratio: 0.489 int./0.476 exh. - Lobe Separation degrees: 107 - Valve Springs Required: No