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COMP Cams Thumpr Hydraulic Roller Cam and Lifter Kits CL12-601-8

COMP Cams CL12-601-8 - COMP Cams Thumpr Hydraulic Roller Cam and Lifter Kits

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Cam and Lifters, Hydraulic Roller Tappet, Advertised Duration 291/311, Lift .521/.507, Chevy, Small Block, Kit

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Brand: COMP Cams
Manufacturer's Part Number: CL12-601-8
Part Type: Camshaft Kits
Summit Racing Part Number: CCA-CL12-601-8

UPC: 036584153412
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: 0.521 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.507 in.
Valve Lift with Factory Rocker Arm Ratio: 0.521 int./0.507 exh.
Lobe Separation (degrees): 107
Camshaft Gear Attachment: 3-bolt
Grind Number: 291TR7
Computer-Controlled Compatible: No
Lifters Included: Yes
Lifter Style: Hydraulic roller
Valve Springs Included: No
Retainers Included: No
Locks Included: No
Valve Stem Seals Included: No
Timing Chain and Gears Included: No
Assembly Lubricant Included: No
Pushrods Included: No
Rocker Arms Included: No
Gaskets Included: No
Valve Springs Required: Yes
Quantity: Sold as a kit.
In-Store Pickup: Choose In-store pick-up (OH, GA, NV) on our web site.

COMP Cams is bringing the musclecar sound back, and it's nastier than ever! Let's 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. They're 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.

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1 Customer Reviews for COMP Cams CL12-601-8 - COMP Cams Thumpr Hydraulic Roller Cam and Lifter Kits

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Comp Cams is top quality. This Thumpr series camshaft turns heads everywhere I go. 355 SBC paired with 180cc Dart Aluminum Heads to go along with this roller cam. 1981 Chevrolet C10 Pickup, this combination pulls hard & strong. Idles very well, sounds absolutely terrific and does a good job driving around town, no issues. Just make sure if your running a mechanical fuel pump to get the correct tipped fuel pushrod. ...read more

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Reviewer: MATTHEW from OH

Date: August 01, 2014

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Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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