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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-SK33-234-4
Xtreme Energy 256H Hydraulic Flat Tappet Camshaft Small Kit Lift: .487" /.493" Duration: 256°/268° RPM Range: 1000-5200
$44595
Ships on 10/23/2026
Lowest Price GuaranteeFord 352-428 c.i. 8 CYL. 1963-1977
- Xtreme Energy 256H Hydraulic Flat Tappet Camshaft Small Kit
- Hydraulic-Strong torque through low and mid-range
- Good 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
Strong torque through low and mid-range. Good economy. Mild idle.
Lift: .487''/.493''
Duration: 256°/268°
RPM Range: 1000-5200
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 Kit
BrandCOMP CAMS
Package Height5.6
Package Width10.3
Package Length25.3
Weight20.37 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)218
Cam StyleHydraulic flat tappet
Grind NumberXE256H
Exh. Duration Advertised (Deg)268
Locks IncludedNo
Engine Make/SizeFord 390-428
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.487
Int. Duration @ .050 In. (Deg)212
Assembly Lubricant IncludedYes
Basic Operating Rpm Range1,000-5,200
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.487 in (12.37 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)256
Lobe Separation (Deg)110
Rpm Range1000-5200
Lifter StyleHydraulic flat tappet
Advertised Duration256 int./268 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.493
Valve Springs IncludedNo
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.487 int./0.493 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.493 in (12.522 mm)
Advertised Intake Duration256
Intake Duration At 050 Inch Lift212
Exhaust Duration At 050 Inch Lift218
Timing Chain StyleDouble non-roller
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration268
Lifter TypeHydraulic Flat Tappet
Duration At 050 Inch Lift212 int./218 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberSK33-234-4
Package Qty1
Package TypeEA
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