Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededCOMP CAMSPART NUMBER: 249-K42-231-4
Magnum 280H Hydraulic Flat Tappet Camshaft Complete Kit Lift: .490" /.490" Duration: 280°/280° RPM Range: 2000-6000
$70295
Ships on 10/23/2026
Lowest Price GuaranteeOldsmobile 260-455 c.i. 8 cyl. 1967-1990
- Magnum 280H Hydraulic Flat Tappet Camshaft Complete 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 Height5.8
Package Width10.4
Package Length25.5
Weight25.2 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)230
Cam StyleHydraulic flat tappet
Grind NumberOL 280H-10
Exh. Duration Advertised (Deg)280
Locks IncludedYes
Engine Make/SizeOlds 260-455
Retainers IncludedYes
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 IncludedYes
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.490 int./0.490 exh.
QuantitySold as a kit
Valve Stem Seals IncludedYes
Exhaust Valve Lift0.49 in (12.446 mm)
Advertised Intake Duration280
Outside Diameter Of Outer Spring1.437 in (36.5 mm)
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 RequiredNo
Lifters IncludedYes
Vendor Part NumberK42-231-4
Package Qty1
Package TypeEA
No Questions
No Reviews
Items You Need
![Valve Spring Compressor [Stud Mount]](https://www.jegs.com/images/mini_200/500/555/555-80521.jpg)
![159 Engine Break-In Oil Additive [12-Ounce]](https://www.jegs.com/images/mini_200/200/249/249-159.jpg)
![Valve Spring Compressor [Stud Mount]](https://www.jegs.com/images/mini_200/500/555/555-80518.jpg)
JEGS
Universal Camshaft Installation/Removal Tool Includes 4 camshaft adapters
Part Number : 555-80599
$4779$51.99
You Save$4.20
![Precision Cam Degree Wheel Kit [11 in.]](https://www.jegs.com/images/mini_200/500/555/555-81621.jpg)
![Break-In/Engine Oil Supplement [12 oz. Bottle]](https://www.jegs.com/images/mini_200/500/555/555-28060.jpg)
![Engine Assembly Lube [4 oz. Bottle]](https://www.jegs.com/images/mini_200/500/555/555-28000.jpg)
JEGS
Part Number : 555-80599
$4779$51.99
You Save$4.20
Some parts are not legal for use in California or other states with similar laws / regulations
