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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-K42-221-4
Xtreme Energy 256H Hydraulic Flat Tappet Camshaft Complete Kit Lift .453"/.456" Duration 256°/268° RPM Range 1000-5200
$56295
Ships on Oct 27, 2026
Lowest Price GuaranteeCurrently Unavailable
This product is currently not available. Please call customer service for assistance at 1-800-345-4545.
Oldsmobile 260-455 c.i. 8 cyl. 1967-1990
- Xtreme Energy 256H Hydraulic Flat Tappet Camshaft Complete Kit
- Produces Better Throttle Response
- Produces Top Engine Horsepower
- Delivers Increased Engine Vacuum
- 1 Year Limited Warranty
Olds; Oldsmobile; Cutlass; Cutlass Supreme; 98; Calais; Ciera; Custom Cruiser; Starfire; Firenza; 88; Rocket; Rocket 88; Vista Cruiser; Delta 88; 260; 442; 307; 350; 403; 400; 425; 455
Strong torque through low end and mid-range, good idle.
Lift .453"/.456"
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.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Part TypeCamshaft Kit
BrandCOMP CAMS
Package Height5.2
Package Width10.3
Package Length25.6
Weight24.9 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)218
Cam StyleHydraulic flat tappet
Grind NumberOL XE256H-10
Exh. Duration Advertised (Deg)268
Locks IncludedYes
Engine Make/SizeOlds 260-455
Retainers IncludedYes
Intake Valve Lift With Factory Rocker Arm Ratio (I0.453
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 Lift0.453 in (11.506 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 (0.456
Valve Springs IncludedYes
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.453 int./0.456 exh.
QuantitySold as a kit
Valve Stem Seals IncludedYes
Exhaust Valve Lift0.456 in (11.582 mm)
Advertised Intake Duration256
Outside Diameter Of Outer Spring1.494 in (37.9 mm)
Intake Duration At 050 Inch Lift212
Exhaust Duration At 050 Inch Lift218
Timing Chain StyleLink belt
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration268
Lifter TypeHydraulic Flat Tappet
Duration At 050 Inch Lift212 int./218 exh.
Valve Springs RequiredNo
Lifters IncludedYes
Vendor Part NumberK42-221-4
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
