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COMP Cams Thumpr Hydraulic Roller Camshaft Small Block Chevy

(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 + 249 more models)

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Part Number

2 part numbers · from $549.95
Sale Price

from $549.95

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The COMP Cams Thumpr Hydraulic Roller Camshaft is built for Small Block Chevy engines. It gives you the aggressive, choppy idle of a big-cam muscle car, and it works with a hydraulic roller lifter setup. If you're looking for a Thumpr roller cam, a hydraulic roller cam, or a Chevy small block performance camshaft, this product line is made for that kind of build.

Key Features:

  • Signature Thumpr idle: The lobe profiles have aggressive lobe separation and asymmetrical lobe designs. These give the engine a deep, rumbling idle.
  • Hydraulic roller design: The roller lifters cut friction and wear. They also allow faster valve action than comparable flat tappet designs.
  • Street-friendly operation: The hydraulic lifters need no routine valve lash adjustment. This makes the cams a good match for street cars, cruisers and weekend performance builds.
  • Performance gains: A well-matched cam, valvetrain and compression ratio can increase midrange and upper-RPM power over a stock camshaft.
  • Precision manufacturing: COMP Cams grinds its camshafts from quality cores. The company has a long record of engineering and testing performance valvetrain components.

For best results, pair the camshaft with matching COMP Cams valve springs, pushrods, lifters and other valvetrain parts. Several grind options are available in this line, so you can match the cam to your engine combination and your goals for the build.

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 + 246 more models

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2 items

Description
Specifications
Advertised Exhaust Duration303
Advertised Intake Duration283
AMAZON ASINB002EDWPOA
Assembly Lubricant IncludedNo
Basic Operating RPM Range1,900-5,600
C.A.R.B. E.O. NumberN/A
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.
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. Exemption ReasonN/A
California Proposition 65WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
Cam and Lifter Kit UpgradeCL08-600-8
Cam TypeHydraulic Roller
Cam, Lifter and Gear Drive UpgradeGK08-600-8
Camshaft Gear Attachment3-Bolt
Camshaft MaterialAustempered Ductile Iron
Camshaft SeriesThumpr
Engine FamilyChevrolet 305-350 c.i. 8 Cylinder O.E. Roller (1987-1998)
Exhaust Duration at .050 inch Lift241
Exhaust Valve Lift0.498
Grind Number283THR7
Intake Duration at .050 Inch Lift227
Intake Valve Lift0.513
K-Kit UpgradeK08-600-8
Lifter TypeHydraulic Roller
Lifters IncludedNo
LOBE SEPARATION107
UsageStreet/Performance
Valve Springs RequiredYes
$577.95
PART NUMBER: 08-600-8
In Stock (10+)
Usually delivered within 2 days
Description
Specifications
Advertised Exhaust Duration303
Advertised Intake Duration283
AMAZON ASINB0014F35R0
Assembly Lubricant IncludedNo
Basic Operating RPM Range1,900-5,600
C.A.R.B. E.O. NumberN/A
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.
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. Exemption ReasonN/A
California Proposition 65WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
Cam and Lifter Kit UpgradeCL12-600-8
Cam TypeHydraulic Roller
Cam, Lifter and Gear Drive UpgradeGK12-600-8
Camshaft Gear Attachment3-Bolt
Camshaft MaterialAustempered Ductile Iron
Camshaft SeriesThumpr
Engine FamilyChevrolet 262-400 c.i. 8 Cylinder (1958-1998)
Exhaust Duration at .050 inch Lift241
Exhaust Valve Lift0.497
Grind Number283THR7
Intake Duration at .050 Inch Lift227
Intake Valve Lift0.511
K-Kit UpgradeK12-600-8
Lifter TypeHydraulic Roller
Lifters IncludedNo
LOBE SEPARATION107
UsageStreet/Performance
Valve Springs RequiredYes
$549.95
PART NUMBER: 12-600-8
In Stock (10+)
Usually delivered within 2 days

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