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.
Additional Attributes:
- GTIN: 00036584212980
- Advertised Exhaust Duration: 312
- Advertised Intake Duration: 294
- Amazon ASIN: B005H89TZW
- Assembly Lubricant Included: Yes
- Basic Operating RPM Range: 2,500-6,400
- C.A.R.B. E.O. Number: N/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 Reason: N/A
- Cam and Lifter Kit Upgrade: CL32-602-5
- Cam Type: Hydraulic Flat Tappet
- Camshaft Gear Attachment: 1-Bolt
- Camshaft Material: Cast Iron
- Camshaft Series: Thumpr
- Engine Family: Ford 351C, 351M-400M 8 Cylinder (1970-1983)
- Exhaust Duration at .050 inch Lift: 257
- Exhaust Valve Lift: 0.515
- Grind Number: 295TH7
- Intake Duration at .050 Inch Lift: 242
- Intake Valve Lift: 0.531
- K-Kit Upgrade: K32-602-5
- Lifter Type: Hydraulic Flat Tappet
- Lifters Included: No
- Lobe Separation: 107
- Usage: Street/Strip
- Valve Springs Required: Yes
Extended Information:
- Emissions : EPA Eligible
- Life Cycle Status: Available To Order
Packaging:
- Quantity of Each: 1
- Package UOM: EA
- Dimension: 23.3 x 3 x 2.6 inches
All warranty questions, claims or otherwise should be directed toward the manufacturer, COMP Cams.