Big Mutha Thumpr Retro-Fit Hydraulic Roller Camshaft and Lifter KitLift: .533"/.519"Duration: 299�/319�Lobe Separation Angle: 107�RPM Range: 2500-6200 Camshaft And Lifter Kit3 Grinds To Fit All Of Your Performance NeedsLong Exhaust DurationProduces A Powerful Hard-Hitting Exhaust NoteExcellent Horsepower Gains And Broad Torque CurveDelivers Real Seat Of The Pants PerformanceDesigned For Use w/Latest In ValveTrain Components1 Year Limited Warranty265, 283, 307, 302, 305, 327, 350, 383, 400, 427, L46, L48, L65, LM1, LT-1, L82, L81, LS9, L83, L98, L05, LG3, LG4, LT1, LT4, Camaro, Corvette, Chevelle, Stingray, Silverado, C10, Firebird, Chevrolet, Chevy, Small Block Chevy, Caprice,.