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COMP Cams CL42-601-5 Mutha' Thumpr 234/249 Hydraulic Flat Cam And Lifter Kit For Oldsmobile 260-455

(Chevrolet Camaro 1972-74, Corvette 1972, Impala 1972-74, Malibu 1973, Chevelle 1973, Caprice 1973, 1986-90, Nova 1972-74, Bel Air 1972-74 + 44 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

CL42-601-5
6 reviews
Sale Price

$427.95

Estimated ship date Tuesday, November 24

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Product Details

The COMP Cams Mutha' Thumpr CL42-601-5 is a complete camshaft and lifter kit engineered specifically for Oldsmobile 260-455 cubic inch V8 engines. This aggressive hydraulic flat tappet camshaft delivers the signature Thumpr sound with a lopey idle and powerful mid-range performance, making it ideal for street machines and performance builds seeking that classic muscle car rumble.

Key Specifications:

  • Advertised Duration: 234°/249° intake/exhaust
  • Hydraulic flat tappet design for reliability and easy maintenance
  • Optimized for Oldsmobile 260, 307, 350, 403, 425, and 455 engines
  • Delivers aggressive sound with improved throttle response
  • Designed for street performance applications with automatic or manual transmissions

Complete Kit Includes:

  • High-performance camshaft
  • Matching hydraulic flat tappet lifters (16)
  • Assembly lube for proper break-in
  • COMP Cams decals
  • Detailed installation instructions

The Mutha' Thumpr series is designed to produce maximum sound and performance without requiring extensive modifications. This kit provides everything needed for a professional camshaft installation, ensuring proper valve train operation and long-lasting performance. Best suited for vehicles with a 2,000+ RPM stall converter and 9.0:1 or higher compression ratio.

Products specifications

Fits

Chevrolet Camaro 1972-74, Corvette 1972, Impala 1972-74, Malibu 1973, Chevelle 1973, Caprice 1973, 1986-90, Nova 1972-74, Bel Air 1972-74, Laguna 1973-74; Pontiac Firebird 1977-79, Grand Prix 1977, Bonneville 1972, 1977-81 + 40 more models

Advertised Exhaust Duration

304

Advertised Intake Duration

286

Basic Operating RPM Range

2,200-6,100

Cam Type

Hydraulic Flat Tappet

Kit Type

Cl-Kit - Cam and Lifter Kit

Exhaust Valve Lift

0.486

Exhaust Duration at .050 inch Lift

249

Camshaft Material

Cast Iron

Engine Family

Oldsmobile 260-455 c.i. 8 Cylinder (1967-1990)

AMAZON ASIN

B005H89VEG

Assembly Lubricant Included

Yes

Camshaft Gear Attachment

1-Bolt

Valve Springs Required

Yes

Lifter Type

Hydraulic Flat Tappet

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.

Gaskets Included

No

Locks Included

No

Intake Duration at .050 Inch Lift

234

Lifters Included

Yes

Retainers Included

No

Timing Chain and Gears Included

No

Intake Valve Lift

0.5

LOBE SEPARATION

107

Usage

Street/Strip

Valve Stem Seals Included

No

Camshaft Series

Thumpr

So far, nice and easy transaction.

thank you for making it so easy to get what I need!!

Easy and Great Price! Great Experience!

Best price I could find after hours of searching, I recommend 100%!!!

It was nice and easy.

Easy to use website. The belts I ordered didn't have a picture but I knwew what I was looking for.

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