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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-10-603-5
Mutha" Thumpr Hydraulic Flat Tappet Camshaft Lift .500"/.486" Duration 287/304 RPM Range 2200-6100
$32595
Ships on 09/15/2026
Lowest Price GuaranteeAMC 290-401
- Mutha' Thumpr Hydraulic Flat Tappet Camshaft
Lift .500"/.486"
Duration 287/304
RPM Range 2200-6100
Mutha' Thumpr™ - High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle.
AMC; Jeep; 4.0; 290; XJ; Cherokee; Wagoneer; Comanche; Grand Wagoneer; Wrangler; JK; Rambler; Eagle; ZJ; Chrysler; AM General; American Motors; 327; 390; 304; 327; 343; 360; 5.9; Rebel; Nash; AMX; Javelin
High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle.
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Part TypeCamshaft
BrandCOMP CAMS
Package Height2.8
Package Width3.0
Package Length24.2
Weight10.38 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)249
Cam StyleHydraulic flat tappet
Grind Number287TH7
Exh. Duration Advertised (Deg)304
Engine Make/SizeAMC 290-401
Intake Valve Lift With Factory Rocker Arm Ratio (I0.5
Int. Duration @ .050 In. (Deg)235
Basic Operating Rpm Range2,200-6,100
Intake Valve Lift0.5 in (12.7 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)287
Lobe Separation (Deg)107
Rpm Range2200-6100
Advertised Duration287 int./304 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.486
UsageStreet/Strip
Valve Lift With Factory Rocker Arm Ratio0.500 int./0.486 exh.
QuantitySold individually
Exhaust Valve Lift0.486 in (12.344 mm)
Advertised Intake Duration287
Intake Duration At 050 Inch Lift235
Exhaust Duration At 050 Inch Lift249
Advertised Exhaust Duration304
Lifter TypeHydraulic Flat Tappet
Duration At 050 Inch Lift235 int./249 exh.
Valve Springs RequiredYes
Vendor Part Number10-603-5
Package Qty1
Package TypeEA
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