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COMP Cams K12-600-8 Thumpr 227/241 Hydraulic Roller Cam K-Kit for Chevy Small Block

(GMC G2500 1979-95, Yukon 1992-95, K1500 1979-86, 1988-95, C1500 1979-86, 1988-95, K2500 1979-86, 1988-95, Jimmy 1970-91 + 242 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

K12-600-8
9 reviews
Sale Price

$1,833.95

2 left at this price

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Usually delivered within 2 days

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Product Details

The COMP Cams K12-600-8 Thumpr Hydraulic Roller Cam K-Kit is a complete performance camshaft package designed for Chevrolet Small Block V8 engines. This all-in-one kit features the popular Thumpr camshaft profile with 227/241 duration specs, engineered to deliver aggressive idle tone, strong mid-range torque, and improved throttle response for street and muscle car applications.

Complete K-Kit Includes:

  • Hydraulic roller camshaft with Thumpr 227/241 profile
  • Hydraulic roller lifters matched to camshaft specifications
  • High-performance valve springs for increased lift capability
  • Steel retainers and valve locks for reliable valve train operation
  • Valve stem seals to prevent oil consumption
  • Timing chain set for precise cam timing
  • Assembly lube for proper break-in
  • Installation instructions and COMP Cams decals

Key Features:

  • Aggressive lope idle sound characteristic of the Thumpr series
  • Hydraulic roller design eliminates break-in procedures required by flat tappet cams
  • Optimized for street performance with strong off-idle response
  • Complete kit eliminates guesswork in selecting compatible valve train components
  • Direct bolt-in upgrade for stock Chevy Small Block engines

This K-Kit is ideal for enthusiasts looking to upgrade their Chevrolet Small Block engine with a complete, matched camshaft package that delivers both performance gains and the distinctive muscle car sound that made the Thumpr series famous. Recommended for engines with aftermarket intake, headers, and 2,000+ RPM stall converters for optimal performance.

Products specifications

Fits

GMC G2500 1979-95, Yukon 1992-95, K1500 1979-86, 1988-95, C1500 1979-86, 1988-95, K2500 1979-86, 1988-95, Jimmy 1970-91, C3500 1979-86, 1988-95, K2500 Suburban 1979-86, 1992-95, K3500 1979-86, 1988-95 + 239 more models

Advertised Exhaust Duration

303

Basic Operating RPM Range

1,900-5,600

Exhaust Valve Lift

0.497

Intake Valve Lift

0.511

Exhaust Duration at .050 inch Lift

241

Camshaft Material

Austempered Ductile Iron

Kit Type

K-Kit - Complete Kit

Usage

Street/Performance

Assembly Lubricant Included

No

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

Camshaft Gear Attachment

3-Bolt

Lifter Type

Hydraulic Roller

Intake Duration at .050 Inch Lift

227

Cam Type

Hydraulic Roller

Lifters Included

Yes

LOBE SEPARATION

107

Valve Springs Included

Yes

Advertised Intake Duration

283

Engine Family

Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)

Camshaft Series

Thumpr

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