Changing Font Size

This kit is designed to upgrade your flat-tappet Small Block LA engine to hydraulic roller cam/lifters!
Using this kit, you are not required to modify anything in your engine!

Cam Style		Hydraulic roller tappet
Basic Operating RPM Range		2,200-5,900
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		291
Advertised Exhaust Duration		311
Advertised Duration		291 int./311 exh.
Intake Valve Lift with Factory Rocker Arm Ratio		0.522 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio		0.509 in.
Valve Lift with Factory Rocker Arm Ratio		0.522 int./0.509 exh.
Lobe Separation (degrees)		107
Grind Number		291THR7
Computer-Controlled Compatible		No
Lifters Included		Yes
Lifter Style		Hydraulic roller
Valve Springs Included		Yes
Retainers Included		Yes
Locks Included		Yes
Valve Stem Seals Included		Yes
Timing Chain and Gears Included		Yes
Timing Chain Style		Double roller
Assembly Lubricant Included		No
Pushrods Included		No
Rocker Arms Included		No
Gaskets Included		No

COMP Cams is bringing the muscle car sound back, and its nastier than ever! Lets face it--few things serve to grab our attention at a car show or cruise night more than a car with a thumping, high performance idle.
In fact, one of the most frequent questions fielded when customers call our tech line is, "what camshaft will give my car that mean-sounding idle?"
In an ongoing quest to provide you with the performance and sound that you demand, COMP Cams engineering team proudly introduces the Thumpr series cam and lifter kits.
The Thumpr camshafts are a new series of hydraulic roller camshafts designed for use in engines that were originally equipped with flat tappet camshafts.
The lobe profile and grind characteristics of these new Thumpr camshafts use a combination of an early exhaust valve opening, a long exhaust duration, and a generous amount of intake and exhaust overlap.
Theyre designed to maximize the rough-idling characteristics of the cams, giving you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine.
Thumpr camshafts are available in three different grind profiles; each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range.
These Thumpr series cam and lifter kits feature a cutting-edge hydraulic roller design that delivers a substantial power increase over an identical hydraulic flat tappet grind without sacrificing reliability or ease of maintenance.
New high performance drop-in hydraulic roller lifters are precision-engineered to fit classic Chrysler Small Block engines.

This product is sold as a kit.