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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-42-231-4
Magnum 280H Hydraulic Flat Tappet Camshaft Lift: .490"/.490" Duration: 280°/280° RPM Range: 2000-6000
$30995
Ships on Sep 15, 2026
Lowest Price GuaranteeOldsmobile 260-455 c.i. 8 cyl. 1967-1990
- Magnum 280H Hydraulic Flat Tappet Camshaft
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
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
BrandCOMP CAMS
Package Height2.75
Package Width2.87
Package Length24.5
Weight10.6 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)230
Cam StyleHydraulic flat tappet
Grind NumberOL 280H-10
Exh. Duration Advertised (Deg)280
Engine Make/SizeOlds 260-455
Intake Valve Lift With Factory Rocker Arm Ratio (I0.49
Int. Duration @ .050 In. (Deg)230
Basic Operating Rpm Range2,000-6,000
Intake Valve Lift0.49 in (12.446 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)280
Lobe Separation (Deg)110
Rpm Range2000-6000
Advertised Duration280 int./280 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.49
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.490 int./0.490 exh.
QuantitySold individually
Exhaust Valve Lift0.49 in (12.446 mm)
Advertised Intake Duration280
Intake Duration At 050 Inch Lift230
Exhaust Duration At 050 Inch Lift230
Advertised Exhaust Duration280
Lifter TypeHydraulic Flat Tappet
Duration At 050 Inch Lift230 int./230 exh.
Valve Springs RequiredYes
Vendor Part Number42-231-4
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
