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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-SK51-247-4
Comp Cams Magnum Mechanical Flat Tappet Camshafts
$46995
Ships on 09/10/2026
Lowest Price GuaranteePontiac 265-455ci 8-cyl. 1955-1981
- Magnum 306S Mechanical Flat Tappet Camshaft Small Kit
- Cams Are Very Aggressive
- Designed For Performance Oriented Vehicles
- Deliver More Power Than Standard Camshafts
- 1 Year Limited Warranty
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;
Race idle, Pro Street. Needs 10.5:1+ compression and 3500+ stall. Limited street use.
Lift: .555"/.555"
Duration: 306°/306°
Lobe Separation Angle: 110°
RPM Range: 3000-6500
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)260
Cam StyleMechanical flat tappet
Grind Number306S
Exh. Duration Advertised (Deg)306
Locks IncludedNo
Engine Make/SizePontiac 265-455
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.555
Int. Duration @ .050 In. (Deg)260
Assembly Lubricant IncludedYes
Basic Operating Rpm Range3,000-6,500
Pushrods IncludedNo
Gaskets IncludedNo
Intake Valve Lash0.022 in (0.559 mm)
Rocker Arms IncludedNo
Intake Valve Lift0.555 in (14.097 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)306
Lobe Separation (Deg)110
Rpm Range3000-6500
Lifter StyleMechanical flat tappet
Advertised Duration306 int./306 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.555
Valve Springs IncludedNo
UsageStreet/Strip
Valve Lift With Factory Rocker Arm Ratio0.555 int./0.555 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lash0.022 in (0.559 mm)
Exhaust Valve Lift0.555 in (14.097 mm)
Advertised Intake Duration306
Intake Duration At 050 Inch Lift260
Exhaust Duration At 050 Inch Lift260
Timing Chain StyleDouble roller
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration306
Lifter TypeMechanical Flat Tappet
Duration At 050 Inch Lift260 int./260 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberSK51-247-4
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
