Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededCOMP CAMSPART NUMBER: 249-SK51-234-4
Magnum 280H Hydraulic Flat Tappet Camshaft Small Kit Lift: .480" /.480" Duration: 280°/280° RPM Range: 2000-6000
$46195
Ships on 10/23/2026
Lowest Price GuaranteePontiac 265-455ci V-8 1955-81
- Magnum 280H Hydraulic Flat Tappet Camshaft Small Kit
Lift: .480''/.480"
Duration: 280°/280°
RPM Range: 2000-6000
Choppy idle, increased compression advised. Needs 2500-stall and lower gears, use headers.
| Operating Range: | 2000-6000 RPM |
| Duration Advertised: | 280° Intake / 280° Exhaust |
| Duration @ .050' Lift: | 230° Intake / 230° Exhaust |
| Valve Lift w/1.5 Rockers: | .480' Intake / .480' Exhaust |
| Lobe Separation Angle: | 110° |
Pontiac; Super Duty; SD; SD455; HO; 455 HO; Trans-Am; Catalina; Firebird; Formula; 421; 455; 400; 428; 350; 265; 301; 370; 389; 301; 287; 317; 347; Ram Air; Ram Air IV; Ram Air III; Bonneville; Grand Prix; LeMans; Parisienne; Grand Am; Century; Regal;
Choppy idle, increased compression advised. Needs 2500+ stall and lower gear, use headers.
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 Height5.0
Package Width10.5
Package Length26.0
Weight21.0 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)230
Cam StyleHydraulic flat tappet
Grind NumberP 280H-10
Exh. Duration Advertised (Deg)280
Locks IncludedNo
Engine Make/SizePontiac 265-455
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.48
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 Lift0.48 in (12.192 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 (0.48
Valve Springs IncludedNo
UsageStreet/Strip
Valve Lift With Factory Rocker Arm Ratio0.480 int./0.480 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.48 in (12.192 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
Duration At 050 Inch Lift230 int./230 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberSK51-234-4
Package Qty1
Package TypeEA
No Questions
No Reviews
Items You Need
![159 Engine Break-In Oil Additive [12-Ounce]](https://www.jegs.com/images/mini_200/200/249/249-159.jpg)
Some parts are not legal for use in California or other states with similar laws / regulations
