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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-31-603-5
Big Mutha" Thumpr Hydraulic Flat Camshaft Lift .512"/.497" Duration 295/312 RPM Range 2500-6400
$32595
Ships on 09/14/2026
Lowest Price GuaranteeFord 289-302 C.I. 8 cyl. 1963-1995
- Big Mutha' Thumpr Hydraulic Flat Camshaft
Lift .512"/.497"
Duration 295/312
RPM Range 2500-6400
Big Mutha' Thumpr™ : Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
Ford; SBF; Mustang; Windsor; Fairlane; Meteor; Mercury; GT; 22; 260; Sunbeam; Tiger; 289; 302; 351; 289; HiPo; K-Code; GT-350; Shelby; Boss; 5.0; 308; Windsor; Torino; Cougar; F-150; Squire; Thunderbird; LTD; Galaxie; Grand Marquis
Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very 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 Width3.2
Package Length24.3
Weight9.75 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)257
Cam StyleHydraulic flat tappet
Grind Number295TH7
Exh. Duration Advertised (Deg)312
Engine Make/SizeFord 289-302
Intake Valve Lift With Factory Rocker Arm Ratio (I0.512
Int. Duration @ .050 In. (Deg)243
Basic Operating Rpm Range2,500-6,400
Intake Valve Lift0.512 in (13.005 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)295
Lobe Separation (Deg)107
Rpm Range2500-6400
Advertised Duration295 int./312 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.497
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.512 int./0.497 exh.
QuantitySold individually
Exhaust Valve Lift0.497 in (12.624 mm)
Advertised Intake Duration295
Intake Duration At 050 Inch Lift243
Exhaust Duration At 050 Inch Lift257
Advertised Exhaust Duration312
Lifter TypeHydraulic Flat Tappet
Duration At 050 Inch Lift243 int./257 exh.
Valve Springs RequiredYes
Vendor Part Number31-603-5
Package Qty1
Package TypeEA
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