My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

COMP Cams 01-602-8 Big Mutha' Thumpr 243/257 Hydraulic Roller Camshaft

(Chevrolet K2500 1996-2000, Express 3500 1996-2000, C3500 1996-2000, C2500 1996-2000, K3500 1996-2000, K2500 Suburban 1996-99, P30 1996-99 + 11 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

01-602-8
8 reviews
Sale Price

$577.95

Estimated ship date Wednesday, November 25

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The COMP Cams Big Mutha' Thumpr camshaft delivers the aggressive, hard-hitting exhaust note that muscle car and street rod enthusiasts crave. This hydraulic roller camshaft features a 243/257 duration profile specifically engineered for Chevrolet Big Block Gen VI engines, combining that iconic race car idle with impressive performance gains.

Key Features:

  • Hydraulic roller design for durability and consistent performance
  • 243/257 duration profile optimized for aggressive idle and strong mid-range power
  • Early intake valve opening and extended exhaust duration create maximum overlap
  • Delivers excellent horsepower gains with a broad, usable torque curve
  • Designed specifically for Chevrolet Big Block Gen VI applications

Installation Requirements:

  • Aftermarket torque converter required for proper operation
  • Lower gear ratio recommended to keep engine in optimal powerband
  • Reduced idle vacuum requires vacuum canister, pump, or hydroboost for power brake systems

Perfect for street machines that demand head-turning sound and serious performance, this Thumpr camshaft transforms your big block Chevy into a beast with an unmistakable presence.

Products specifications

Fits

Chevrolet K2500 1996-2000, Express 3500 1996-2000, C3500 1996-2000, C2500 1996-2000, K3500 1996-2000, K2500 Suburban 1996-99, P30 1996-99, G30 1996, C2500 Suburban 1996-99; GMC K2500 1996-2000, Savana 3500 1996-2000, C3500 1996-2000 + 6 more models

Advertised Exhaust Duration

319

Advertised Intake Duration

299

Basic Operating RPM Range

2,500-6,200

Grind Number

299THR7

Exhaust Valve Lift

0.554

Intake Valve Lift

0.569

Intake Duration at .050 Inch Lift

243

Exhaust Duration at .050 inch Lift

257

Camshaft Material

Austempered Ductile Iron

Engine Family

Chevrolet GEN VI 454 and 502 c.i. 8 Cylinder (1996-1999)

Cam and Lifter Kit Upgrade

CL01-602-8

K-Kit Upgrade

K01-602-8

Assembly Lubricant Included

No

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.

Camshaft Gear Attachment

3-Bolt

Lifter Type

Hydraulic Roller

Cam Type

Hydraulic Roller

LOBE SEPARATION

107

Usage

Street/Strip

AMAZON ASIN

B005H89P7O

Camshaft Series

Thumpr

Easy to find and easy to buy. . .

Fantastic price, positive communication, arrived before promised worked out great!

shipment came very speedy and everything was exactly as expected. All parts were in excellent condition.

Helpful-reasonable prices-reasonable shipping-prompt.

Lowest prices and fast shipping made this a great transaction.

Good price, quick shipping, no instant refund though!

cheapest price, better than summitt or jegs too

Lowest price usually means sub-par customer service. Not the case at Autoplicity. I had questions after my item shipped, they responded promptly and professionally multiple times, and were totally willing to work with me. Very satisfying, would not hesitate to order from Autoplicity again.

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy