Camshaft, Cbvi 299TH R7 Thumpr (01-602-8)
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Compatibility
- Platform
- Universal
- Vehicle-specific fitment
- Review application details below
- Need help?
- Confirm fitment with us before ordering — (714) 202-7886
We list the engine platform a part is built for. That is not year-and-trim application data, so it does not confirm a fit on your specific vehicle.
- Est. install labor: 11.0 hrs — $1,375 at $125/hr. Pick Install at HRC and a 20% labor deposit ($275) is due at checkout; the balance is due at completion.
- An estimate for a stock vehicle, not a quote — we confirm it in writing when you book, before any labor is authorized. Seized hardware, prior modifications, diagnosis and machine work are quoted separately; tuning is arranged through our tuning partner. Questions: (714) 202-7886.
- Warranty & track disclaimer — read before you race it.
- Shipping & returns — rates and RMA terms.
- Installed in-house in Huntington Beach, CA — labor & service policy.
- Affirm and PayPal available at checkout.
More ways to pay at checkout
Designed to deliver an aggressive, hard-hitting exhaust note at idle, the Thumpr camshaft series from COMP Cams also delivers excellent horsepower gains and a broad torque curve. A perfect choice for muscle cars and street rods, the Thumpr series' early intake valve opening and long exhaust duration create optimum overlap for that race car idle. The Thumpr grinds all require an aftermarket torque converter and lower gear ratio to ensure the drivetrain always puts the engine in its powerband. Additionally, Thumpr camshafts typically deliver reduced vacuum at idle, making a vacuum canister, pump or hydroboost a requirement for vehicles running power brakes.
| Part Type | Engine Camshaft |
|---|---|
| Camshaft Series | Thumpr |
| Usage | Street/Strip |
| Cam Type | Hydraulic Roller |
| Grind Number | 299THR7 |
| Basic Operating RPM Range | 2,500-6,200 RPM |
| Intake Duration at .050 Inch Lift | 243° |
| Exhaust Duration at .050 inch Lift | 257° |
| Advertised Intake Duration | 299° |
| Advertised Exhaust Duration | 319° |
| Lobe Separation | 107° |
| Intake Valve Lift | 0.569" |
| Exhaust Valve Lift | 0.554" |
| Lifters Included | No |
| Valve Springs Required | Yes |
| Assembly Lubricant Included | No |
| Camshaft Gear Attachment | 3-Bolt |
| 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 |
| California Proposition 65 | WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov |
| K-Kit Upgrade | K01-602-8 |
| Lifter Type | Hydraulic Roller |
| Title | Big Mutha' Thumpr 243/257 Hydraulic Roller Cam for Chevrolet Big Block GEN VI |
| Amazon ASIN | B005H89P7O |
| 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 Federally Certified Vehicles Manufactured Before 1967? | Yes, but must meet tailpipe emission standards for year of 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 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. Exemption Reason | N/A |
| C.A.R.B. E.O. Number | N/A |
| 10602 | 299THR7 |
| Weight | 10.8467 lb |
| UPC | 036584211952 |
| Country of Origin | USA |
Verified fitment · 199 applications
- Chevrolet C2500 Base 7.4L (1996–2000)
- Chevrolet C2500 Cheyenne 7.4L (1996–1998)
- Chevrolet C2500 LS 7.4L (1999–2000)
- Chevrolet C2500 Silverado 7.4L (1996–1998)
- Chevrolet C2500 Suburban Base 7.4L (1996–1999)
- Chevrolet C2500 Suburban LS 7.4L (1996–1999)
- Chevrolet C2500 Suburban LT 7.4L (1996–1997)
- Chevrolet C2500 WT 7.4L (1998)
- Chevrolet C3500 Base 7.4L (1996–2000)
- Chevrolet C3500 Cheyenne 7.4L (1996–1998)
- Chevrolet C3500 LS 7.4L (1999–2000)
- Chevrolet C3500 Silverado 7.4L (1996–1998)
- Chevrolet Express 3500 Base 7.4L (1996–2000)
- Chevrolet Express 3500 LS 7.4L (1996–2000)
- Chevrolet G30 Beauville 7.4L (1996)
- Chevrolet G30 Chevy Van 7.4L (1996)
- Chevrolet G30 Hi-Cube 7.4L (1996)
- Chevrolet G30 Sportvan 7.4L (1996)
- Chevrolet K2500 Base 7.4L (1996–2000)
- Chevrolet K2500 Cheyenne 7.4L (1996–1998)
- Chevrolet K2500 LS 7.4L (1999–2000)
- Chevrolet K2500 Silverado 7.4L (1996–1998)
- Chevrolet K2500 Suburban Base 7.4L (1996–1999)
- Chevrolet K2500 Suburban LS 7.4L (1996–1999)
- Chevrolet K2500 Suburban LT 7.4L (1996–1997)
- Chevrolet K2500 WT 7.4L (1998)
- Chevrolet K3500 Base 7.4L (1996–2000)
- Chevrolet K3500 Cheyenne 7.4L (1996–1998)
- Chevrolet K3500 LS 7.4L (1999–2000)
- Chevrolet K3500 Silverado 7.4L (1996–1998)
- Chevrolet P30 Base 7.4L (1996–1999)
- GMC C2500 Sierra SL 7.4L (1996–2000)
- GMC C2500 Sierra SLE 7.4L (1996–2000)
- GMC C2500 Sierra SLT 7.4L (1996–2000)
- GMC C2500 Suburban Base 7.4L (1996–1999)
- GMC C2500 Suburban SLE 7.4L (1996–1999)
- GMC C2500 Suburban SLT 7.4L (1996–1999)
- GMC C3500 Sierra SL 7.4L (1996–2000)
- GMC C3500 Sierra SLE 7.4L (1996–2000)
- GMC C3500 Sierra SLT 7.4L (1996–2000)
- GMC G3500 Magnavan 7.4L (1996)
- GMC G3500 Rally 7.4L (1996)
- GMC G3500 Rally Camper Special 7.4L (1996)
- GMC G3500 Rally STX 7.4L (1996)
- GMC G3500 Vandura 7.4L (1996)
- GMC G3500 Vandura Special 7.4L (1996)
- GMC K2500 Sierra SL 7.4L (1996–2000)
- GMC K2500 Sierra SLE 7.4L (1996–2000)
- GMC K2500 Sierra SLT 7.4L (1996–2000)
- GMC K2500 Suburban Base 7.4L (1996–1999)
- GMC K2500 Suburban SLE 7.4L (1996–1999)
- GMC K2500 Suburban SLT 7.4L (1996–1999)
- GMC K3500 Sierra SL 7.4L (1996–2000)
- GMC K3500 Sierra SLE 7.4L (1996–2000)
- GMC K3500 Sierra SLT 7.4L (1996–2000)
- GMC P3500 Base 7.4L (1996–1999)
- GMC Savana 3500 Base 7.4L (1996–2000)
- GMC Savana 3500 SLE 7.4L (1996–2000)
| Part No. | 01-602-8 |
|---|---|
| Brand | COMP Cams |
| Part Type | Engine Camshaft |
| Weight | 10.8467 lb |
| UPC | 036584211952 |
| Country of Origin | USA |
Platform-level fitment (Ford + GM, Phase 1). We publish the engine platform a part is built for — not year-and-trim application data — so nothing here confirms a fit on a specific vehicle. Confirm fitment with us before ordering: (714) 202-7886.