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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-33-602-5
Big Mutha" Thumpr Hydraulic Flat Tappet Camshaft Lift .531"/.515" Duration 294/312 RPM Range 2500-6400
$32595
Ships on 09/15/2026
Lowest Price GuaranteeFord 352-428 c.i. 8 CYL. 1963-1976
- Big Mutha' Thumpr Hydraulic Flat Tappet Camshaft
Lift .531"/.515"
Duration 294/312
RPM Range 2500-6400
Big Mutha' Thumpr™ : Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
Ford, FE, 352, 428, Super Cobra Jet, SCJ, Cobra Jet, Mustang, Mach 1, Shelby, 332, 361, 390, 406, 410, 427, 428, Truck, F100, F150, Ford Truck
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.
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Part TypeCamshaft
BrandCOMP CAMS
Package Height2.8
Package Width3.0
Package Length24.3
Weight10.99 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)257
Cam StyleHydraulic flat tappet
Grind Number295TH7
Exh. Duration Advertised (Deg)312
Engine Make/SizeFord 352-428
Intake Valve Lift With Factory Rocker Arm Ratio (I0.531
Int. Duration @ .050 In. (Deg)242
Basic Operating Rpm Range2,500-6,400
Intake Valve Lift0.531 in (13.487 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)294
Lobe Separation (Deg)107
Rpm Range2500-6400
Advertised Duration294 int./312 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.515
UsageStreet/Strip
Valve Lift With Factory Rocker Arm Ratio0.531 int./0.515 exh.
QuantitySold individually
Exhaust Valve Lift0.515 in (13.081 mm)
Advertised Intake Duration294
Intake Duration At 050 Inch Lift242
Exhaust Duration At 050 Inch Lift257
Advertised Exhaust Duration312
Lifter TypeHydraulic Flat Tappet
Duration At 050 Inch Lift242 int./257 exh.
Valve Springs RequiredYes
Vendor Part Number33-602-5
Package Qty1
Package TypeEA
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