Xtreme Energy 256H Hydraulic Flat Tappet Camshaft Complete Kit Lift .487"/.493" Duration 256°/268° RPM Range 1000-5200

Vehicle Info Needed

COMP CAMSPART NUMBER: 249-K33-234-4

Xtreme Energy 256H Hydraulic Flat Tappet Camshaft Complete Kit Lift .487"/.493" Duration 256°/268° RPM Range 1000-5200

Name: Xtreme Energy 256H Hydraulic Flat Tappet Camshaft Complete Kit Lift .487"/.493" Duration 256°/268° RPM Range 1000-5200
Brand: COMP CAMS
SKU: 249-K33-234-4
Price: 687.95 USD
Availability: InStock

^$687⁹⁵

Ships on 09/15/2026

Lowest Price Guarantee

Ford 352-428 c.i. 8 CYL. 1963-1977

Lift

Duration

RPM Range

Produces Better Throttle Response
Produces Top Engine Horsepower
Delivers Increased Engine Vacuum
1 Year Limited Warranty
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.

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 Kit

BrandCOMP CAMS

Package Height5.2

Package Width10.2

Package Length25.7

Weight26.9 PG

Part CategoryPerformance Parts

Exh. Duration @ .050 In. (Deg)218

Cam StyleHydraulic flat tappet

Grind NumberXE256H

Exh. Duration Advertised (Deg)268

Locks IncludedYes

Engine Make/SizeFord 390-428

Retainers IncludedYes

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 IncludedYes

UsageStreet/Performance

Valve Lift With Factory Rocker Arm Ratio0.487 int./0.493 exh.

QuantitySold as a kit

Valve Stem Seals IncludedYes

Exhaust Valve Lift0.493 in (12.522 mm)

Advertised Intake Duration256

Outside Diameter Of Outer Spring1.475 in (37.5 mm)

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

Part FitmentSemi Universal

Duration At 050 Inch Lift212 int./218 exh.

Valve Springs RequiredNo

Lifters IncludedYes

Vendor Part NumberK33-234-4

Package Qty1

Package TypeEA

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