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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-SK42-231-4
Magnum 280H Hydraulic Flat Tappet Camshaft Small Kit Lift: .490" /.490" Duration: 280°/280° RPM Range: 2000-6000
$46395
Ships on 10/23/2026
Lowest Price GuaranteeOldsmobile 260-455 c.i. 8 cyl. 1967-1990
- Magnum 280H Hydraulic Flat Tappet Camshaft Small Kit
Lift: .490''/.490"
Duration: 280°/280°
RPM Range: 2000-6000
Good for street machine with mild stall. Use headers and lower gears. Rough idle.
| Operating Range: | 2000-6000 RPM |
| Duration Advertised: | 280° Intake / 280° Exhaust |
| Duration @ .050' Lift: | 230° Intake / 230° Exhaust |
| Valve Lift w/1.6 Rockers: | .490' Intake / .490' Exhaust |
| Lobe Separation Angle: | 110° |
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
Good for street machine with 2200+ stall. Use headers and lower gears. Rough idle. Great cam for 455 jet boat with A or B impeller. Performance and skiing.
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 Height5.0
Package Width10.5
Package Length26.0
Weight22.0 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)230
Cam StyleHydraulic flat tappet
Grind NumberOL 280H-10
Exh. Duration Advertised (Deg)280
Locks IncludedNo
Engine Make/SizeOlds 260-455
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.49
Int. Duration @ .050 In. (Deg)230
Assembly Lubricant IncludedYes
Basic Operating Rpm Range2,000-6,000
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.49 in (12.446 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)280
Lobe Separation (Deg)110
Rpm Range2000-6000
Lifter StyleHydraulic flat tappet
Advertised Duration280 int./280 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.49
Valve Springs IncludedNo
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.490 int./0.490 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.49 in (12.446 mm)
Advertised Intake Duration280
Intake Duration At 050 Inch Lift230
Exhaust Duration At 050 Inch Lift230
Timing Chain StyleDouble non-roller
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration280
Lifter TypeHydraulic Flat Tappet
Part FitmentSemi Universal
Duration At 050 Inch Lift230 int./230 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberSK42-231-4
Package Qty1
Package TypeEA
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