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COMP Cams CL51-602-11 Big Mutha' Thumpr Hydraulic Roller Cam and Lifter Kit for Pontiac V8

Manufacturer

Picture for manufacturer COMP Cams

Part Number

CL51-602-11
8 reviews
Sale Price

$1,240.95

Estimated ship date Saturday, November 21

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Live-in-stock inventory

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Fitment guaranteed

Fitment guaranteed

Product Details

The COMP Cams Big Mutha' Thumpr CL51-602-11 is a complete hydraulic roller camshaft and lifter kit engineered specifically for Pontiac 265-455 cubic inch V8 engines. This aggressive cam profile delivers 243/257 degrees of advertised duration, producing the signature choppy idle and aggressive exhaust note that the Thumpr series is known for, while still maintaining excellent street manners and vacuum for power brakes.

Key Features:

  • Hydraulic roller cam design for reduced friction and improved durability compared to flat tappet cams
  • 243/257 advertised duration provides aggressive sound with strong mid-range torque
  • Complete kit includes camshaft, hydraulic roller lifters, assembly lube, decals, and detailed installation instructions
  • Designed specifically for Pontiac V8 engines from 265 to 455 cubic inches
  • Ideal for street/strip applications, muscle car restorations, and enthusiasts seeking that classic hot rod sound
  • Maintains sufficient vacuum for power brake operation unlike more extreme race profiles

The Big Mutha' Thumpr series represents COMP Cams' most aggressive street-friendly camshaft line, delivering maximum attitude and performance for drivers who want their engine to be heard. This complete kit provides everything needed for a professional camshaft upgrade, ensuring proper installation and long-term reliability.

Products specifications

Advertised Exhaust Duration

319

Advertised Intake Duration

299

Basic Operating RPM Range

2,300-6,100

Grind Number

299THR7

Exhaust Valve Lift

0.519

Intake Valve Lift

0.532

Intake Duration at .050 Inch Lift

243

Exhaust Duration at .050 inch Lift

257

K-Kit Upgrade

K51-602-11

Engine Family

Pontiac 265-455 C.I. 8 Cylinder (1955-1981)

Assembly Lubricant Included

No

Camshaft Gear Attachment

1-Bolt

Lifters Included

No

Valve Springs Required

Yes

Prop 65

WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov

C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for On-Road Vehicles?

No

C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?

Yes, but must be a race/competition only vehicle.

C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

Lifter Type

Hydraulic Roller

Cam Type

Hydraulic Roller

Camshaft Material

Billet Steel

LOBE SEPARATION

107

Usage

Street/Strip

Camshaft Series

Thumpr

Thanks

Excellent!

Quick delivery time.

Easy to navigate, and everything went smoothly. Thanks

Good

easy to purchase.

Easy to order, fast shipping, great prices. What else do you need?! I'll buy again

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