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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-SK51-241-4
Magnum 305H Hydraulic Flat Tappet Camshaft Small Kit Lift: .525" /.525" Duration: 305°/305° RPM Range: 2500-6500
$46195
Ships on 10/23/2026
Lowest Price GuaranteePontiac 265-455ci V-8 1955-81
- Magnum 305H Hydraulic Flat Tappet Camshaft Small Kit
Lift: .525''/.525"
Duration: 305°/305°
RPM Range: 2500-6500
Racy idle. Bracket racing cam. Need 10.5:1 compression and 3500+ stall. Low gear ratio.
| Operating Range: | 3000-6500 RPM |
| Duration Advertised: | 305° Intake / 305° Exhaust |
| Duration @ .050' Lift: | 253° Intake / 253° Exhaust |
| Valve Lift w/1.5 Rockers: | .525' Intake / .525' 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;
Racy idle. Bracket racing cam. Needs 10.5:1 compression and 3500+ stall. Low gear ratio.
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.
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Part TypeCamshaft Kit
BrandCOMP CAMS
Package Height5.0
Package Width11.5
Package Length25.0
Weight19.05 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)253
Cam StyleHydraulic flat tappet
Grind NumberP 305H-10
Exh. Duration Advertised (Deg)305
Locks IncludedNo
Engine Make/SizePontiac 265-455
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.525
Int. Duration @ .050 In. (Deg)253
Assembly Lubricant IncludedYes
Basic Operating Rpm Range3,000-6,500
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.525 in (13.335 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)305
Lobe Separation (Deg)110
Rpm Range3000-6500
Lifter StyleHydraulic flat tappet
Advertised Duration305 int./305 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.525
Valve Springs IncludedNo
UsageStreet/Strip
Valve Lift With Factory Rocker Arm Ratio0.525 int./0.525 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.525 in (13.335 mm)
Advertised Intake Duration305
Intake Duration At 050 Inch Lift253
Exhaust Duration At 050 Inch Lift253
Timing Chain StyleDouble non-roller
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration305
Lifter TypeHydraulic Flat Tappet
Duration At 050 Inch Lift253 int./253 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberSK51-241-4
Package Qty1
Package TypeEA
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