Classic Big Mutha' Thumpr Hydraulic Camshaft

The COMP Cams Classic Big Mutha' Thumpr camshaft is a high-performance hydraulic flat tappet camshaft specifically engineered for Chevrolet 348-409 engine families. With advertised durations of 284 degrees for the intake and 303 degrees for the exhaust, and durations of 242 degrees intake / 257 degrees exhaust at 0.050 lift, this camshaft is designed to deliver significant power gains. This camshaft features a .537" intake lift and .521" exhaust lift, coupled with a 107-degree lobe separation angle. It is optimized for a wide RPM range of 2500-6400 RPM, making it suitable for both street and strip applications. The unique grind characteristics are intended to produce a distinctive, head-turning idle sound and maximize mid- to high-RPM power output. For optimal performance and safe operation, this camshaft requires the use of aluminum cylinder heads, a torque converter with a 2500+ stall speed, and the addition of headers. COMP Cams ensures safe piston-to-valve clearance with this grind, allowing for robust performance builds.