COMP Cams 11-242-3 Big Block Chevy Xtreme Energy Hydraulic Flat Tappet Camshaft 1,600-5,800

Most people are familiar with Comp Cams as one of the premiere performance camshaft manufacturers. However, Comp Cams produces top-quality components for every aspect of your engine's valve train components, with race-proven results for top racing teams from the NHRA, NASCAR, and more.

COMP Cams is bringing the musclecar sound back, and it's nastier than ever! Few things grab our attention at a car show or cruise-in like a thumping, high performance idle. In fact, one of the most frequent questions from customers is, "What camshaft will give my car that mean-sounding idle?" For the performance and sound you demand, COMP Cams engineers introduce the Thumpr camshafts—a new series of hydraulic flat tappet cams. The lobe profile and grind characteristics of Thumprs use a combination of early exhaust valve opening, long exhaust duration, and a generous amount of intake and exhaust overlap—to maximize the rough-idling characteristics of the cams. They give you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. Thumpr camshafts are available in several grind profiles; each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range.

Cam Style:Hydraulic flat tappet
Basic Operating RPM Range:1,600-5,800
Intake Duration at 050 inch Lift:224
Exhaust Duration at 050 inch Lift:230
Duration at 050 inch Lift:224 int./230 exh.
Advertised Intake Duration:268
Advertised Exhaust Duration:280
Advertised Duration:268 int./280 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:0.515 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:0.520 in.
Valve Lift with Factory Rocker Arm Ratio:0.515 int./0.520 exh.
Lobe Separation (degrees):110
Computer-Controlled Compatible:No
Grind Number:CB XE268H-10
Valve Springs Required:Yes