Magnum 270H Hydraulic Flat Tappet Camshaft Complete Kit Lift: .476" /.476" Duration: 270°/270° RPM Range: 1800-5800

Vehicle Info Needed

COMP CAMSPART NUMBER: 249-K51-233-4

Magnum 270H Hydraulic Flat Tappet Camshaft Complete Kit Lift: .476" /.476" Duration: 270°/270° RPM Range: 1800-5800

Name: Magnum 270H Hydraulic Flat Tappet Camshaft Complete Kit Lift: .476" /.476" Duration: 270°/270° RPM Range: 1800-5800
Brand: COMP CAMS
SKU: 249-K51-233-4
Price: 690.95 USD
Availability: InStock

^$690⁹⁵

Ships on Oct 27, 2026

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Pontiac 265-455ci V-8 1955-81

Lift:

Duration:

RPM Range:

Operating Range:	1800-5800 RPM
Duration Advertised:	270° Intake / 270° Exhaust
Duration @ .050' Lift:	224° Intake / 224° Exhaust
Valve Lift w/1.5 Rockers:	.476' Intake / .476' 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;

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 Height5.2

Package Width10.4

Package Length25.3

Weight23.65 PG

Part CategoryPerformance Parts

Exh. Duration @ .050 In. (Deg)224

Cam StyleHydraulic flat tappet

Grind NumberP 270H-10

Exh. Duration Advertised (Deg)270

Locks IncludedYes

Engine Make/SizePontiac 265-455

Retainers IncludedYes

Intake Valve Lift With Factory Rocker Arm Ratio (I0.476

Int. Duration @ .050 In. (Deg)224

Assembly Lubricant IncludedYes

Basic Operating Rpm Range1,800-5,800

Pushrods IncludedNo

Gaskets IncludedNo

Rocker Arms IncludedNo

Intake Valve Lift0.476 in (12.09 mm)

Computer-Controlled CompatibleNo

Int. Duration Advertised (Deg)270

Lobe Separation (Deg)110

Rpm Range1800-5800

Lifter StyleHydraulic flat tappet

Advertised Duration270 int./270 exh.

Exhaust Valve Lift With Factory Rocker Arm Ratio (0.476

Valve Springs IncludedYes

UsageStreet/Strip

Valve Lift With Factory Rocker Arm Ratio0.476 int./0.476 exh.

QuantitySold as a kit

Valve Stem Seals IncludedYes

Exhaust Valve Lift0.476 in (12.09 mm)

Advertised Intake Duration270

Outside Diameter Of Outer Spring1.437 in (36.5 mm)

Intake Duration At 050 Inch Lift224

Exhaust Duration At 050 Inch Lift224

Timing Chain StyleDouble non-roller

Timing Chain And Gears IncludedYes

Advertised Exhaust Duration270

Lifter TypeHydraulic Flat Tappet

Part FitmentSemi Universal

Duration At 050 Inch Lift224 int./224 exh.

Valve Springs RequiredNo

Lifters IncludedYes

Vendor Part NumberK51-233-4

Package Qty1

Package TypeEA

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