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COMP Cams K51-600-5 Thumpr 227/241 Hydraulic Flat Cam K-Kit For Pontiac 265-455

(Pontiac GTO 1964-73, Firebird 1967-81, Grand Prix 1962-81, Grand Am 1973-75, 1978-80, Bonneville 1957-81, LeMans 1963-81, Catalina 1955-81 + 30 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

K51-600-5
5 reviews
Sale Price

$781.95

3 left at this price

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The COMP Cams K51-600-5 Thumpr K-Kit delivers everything needed for a complete camshaft upgrade on Pontiac 265-455 cubic inch engines. This comprehensive kit features the popular Thumpr camshaft profile with 227/241 duration specifications, designed to produce an aggressive idle sound and strong low-to-mid range torque characteristics that define the classic muscle car experience.

Complete K-Kit Includes:

  • Thumpr hydraulic flat tappet camshaft with 227/241 duration
  • Hydraulic flat tappet lifters engineered to match cam profile
  • Performance valve springs with proper seat pressure and coil bind clearance
  • Hardened steel retainers and valve locks
  • High-temperature valve stem seals
  • Timing chain set for precise valve timing
  • Assembly lube for proper break-in protection
  • COMP Cams decals and detailed installation instructions

The Thumpr series is known for its lopey idle and strong throttle response, making it ideal for street performance applications where sound and attitude matter. This K-Kit takes the guesswork out of component selection by providing all the matched components needed for a successful installation. Designed specifically for Pontiac V8 engines from 265 to 455 cubic inches, including popular applications like 326, 350, 389, 400, 421, and 455 models.

COMP Cams hydraulic flat tappet camshafts are manufactured from premium materials and precision-ground to exacting specifications for reliable performance and durability. The complete kit format ensures all valvetrain components are properly matched for optimal performance and longevity.

Products specifications

Fits

Pontiac GTO 1964-73, Firebird 1967-81, Grand Prix 1962-81, Grand Am 1973-75, 1978-80, Bonneville 1957-81, LeMans 1963-81, Catalina 1955-81, Tempest 1961-70, Ventura 1960-61, 1971-75, 1977, Parisienne 1967-68, 1972-74 + 27 more models

Advertised Exhaust Duration

297

Advertised Intake Duration

279

Basic Operating RPM Range

2,000-5,800

Cam Type

Hydraulic Flat Tappet

Exhaust Valve Lift

0.465

Intake Valve Lift

0.478

Exhaust Duration at .050 inch Lift

241

Camshaft Material

Cast Iron

Kit Type

K-Kit - Complete Kit

AMAZON ASIN

B0046ZEFGU

Engine Family

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

Usage

Street/Performance

Assembly Lubricant Included

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

Intake Duration at .050 Inch Lift

227

Lifters Included

Yes

LOBE SEPARATION

107

Valve Springs Included

Yes

Camshaft Series

Thumpr

Autoplicity was great, I ordered my springs late Monday night and I received a shipment order confirmation number early Wednesday. So basically 1 business day and my order was out the door, pretty impressive. Can't wait 'till it gets here! Thanks Autoplicity!

Good option

Good price and easy transaction... slow to ship though.

Great prices on a lot of good stuff, shipping isn't what's listed in price comparison, but competitive.

The shipping was fast, although I couldn't get it the first day because they require signature for delivery. I guess it's an added safety measure. Thank you! Will shop buy from again!

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