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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-CL42-231-4
Magnum 280H Hydraulic Flat Tappet Camshaft & Lifter Kit Lift .490"/.490" Duration 280°/280° RPM Range 2000-6000
$39795
Ships on Sep 15, 2026
Lowest Price GuaranteeOldsmobile 260-455 c.i. 8 cyl. 1967-1990
- Magnum 280H Hydraulic Flat Tappet Camshaft & Lifter 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.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Part TypeCamshaft Kit
BrandCOMP CAMS
Package Height3.0
Package Width5.7
Package Length25.3
Weight14.95 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 And Gears IncludedNo
Advertised Exhaust Duration280
Lifter TypeHydraulic Flat Tappet
Duration At 050 Inch Lift230 int./230 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberCL42-231-4
Package Qty1
Package TypeEA
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