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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-CL42-237-4
Magnum 305H Hydraulic Flat Tappet Camshaft & Lifter Kit Lift .540"/.540" Duration 305°/305° RPM Range 3000-6800
$39795
Ships on 10/23/2026
Lowest Price GuaranteeOldsmobile 260-455 c.i. 8 cyl. 1967-1990
- Magnum 305H Hydraulic Flat Tappet Camshaft & Lifter Kit
Lift .540"/.540"
Duration 305°/305°
RPM Range 3000-6800
Hydraulic-Pro Street / Bracket Race cam, good for large engines with 3500 stall and low gears. Radical idle.
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
Pro Street/bracket race cam, good for large engines with 3500+ stall and low gears. Radical idle.
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 Height3.1
Package Width5.6
Package Length25.3
Weight14.75 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)253
Cam StyleHydraulic flat tappet
Grind Number305H
Exh. Duration Advertised (Deg)305
Locks IncludedNo
Engine Make/SizeOlds 260-455
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.54
Int. Duration @ .050 In. (Deg)253
Assembly Lubricant IncludedYes
Basic Operating Rpm Range3,000-6,800
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.54 in (13.716 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)305
Lobe Separation (Deg)110
Rpm Range3000-6800
Lifter StyleHydraulic flat tappet
Advertised Duration305 int./305 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.54
Valve Springs IncludedNo
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.540 int./0.540 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.54 in (13.716 mm)
Advertised Intake Duration305
Intake Duration At 050 Inch Lift253
Exhaust Duration At 050 Inch Lift253
Timing Chain And Gears IncludedNo
Advertised Exhaust Duration305
Lifter TypeHydraulic Flat Tappet
Duration At 050 Inch Lift253 int./253 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberCL42-237-4
Package Qty1
Package TypeEA
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