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COMP Cams 10-602-11 - Camshaft A8 299THR7 Thumper

COMP Cams 10-602-11 - Camshaft A8 299THR7 Thumper

COMP Cams | 10-602-11
SKU: COMP-10-602-11
$627.99 USD
$690.79 USD $627.99 USD
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COMP Cams 10-602-11 - Camshaft A8 299THR7 Thumper

Big Mutha' Thumpr 243/257 Hydraulic Roller Cam for AMC 290-401

Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.

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.

Usage: Street/Performance
Cam Type: Hydraulic Roller
Grind Number: 299THR7
Basic Operating RPM Range: 2,500-6,400
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: 0.552
Exhaust Valve Lift: 0.537
Lifters Included: No
Valve Springs Required: Yes
Assembly Lubricant Included: No
Camshaft Gear Attachment: 1-Bolt
Camshaft Material: Billet Steel
Engine Family: American Motors 290-401 c.i. 8 Cylinder (1966-1991)
Lifter Type: Hydraulic Roller
Amazon ASIN: N/A
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
Grind Number: 299THR7
Camshaft Series: Thumpr
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