Comp Cams  Magnum  Mechanical Flat Tappet Camshafts
InfoVehicle Info Needed
COMP CAMSPART NUMBER: 249-51-245-4

Comp Cams Magnum Mechanical Flat Tappet Camshafts

$30995
ShippingShips on 09/09/2026
Lowest PriceLowest Price Guarantee

Pontiac 265-455ci 8-cyl. 1955-1981
    Magnum 282S Mechanical Flat Tappet Camshaft
    Lift:.495"/.495"
    Duration:282°/282°
    Lobe Separation Angle:110°
    RPM Range:2000-6000

    Mild idle, street machine cam. Needs 9.5:1+ compression, 2000+ stall and headers.
    Operating Range:2000-6000 RPM
    Duration Advertised:282° Intake / 282° Exhaust
    Duration @ .050' Lift:236° Intake / 236° Exhaust
    Valve Lift:.495' Intake / .495' 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;


    Mild idle, street machine cam. Needs 9.5:1+ compression, 2000+ stall and 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
BrandCOMP CAMS
Package Height2.8
Package Width4.2
Package Length24.1
Weight9.1 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)236
Cam StyleMechanical flat tappet
Grind Number282S
Exh. Duration Advertised (Deg)282
Engine Make/SizePontiac 265-455
Intake Valve Lift With Factory Rocker Arm Ratio (I0.495
Int. Duration @ .050 In. (Deg)236
Basic Operating Rpm Range2,000-6,000
Intake Valve Lift0.495 in (12.573 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)282
Lobe Separation (Deg)110
Rpm Range2000-6000
Advertised Duration282 int./282 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.495
UsageStreet/Strip
Valve Lift With Factory Rocker Arm Ratio0.495 int./0.495 exh.
QuantitySold individually
Exhaust Valve Lift0.495 in (12.573 mm)
Advertised Intake Duration282
Intake Duration At 050 Inch Lift236
Exhaust Duration At 050 Inch Lift236
Advertised Exhaust Duration282
Lifter TypeMechanical Flat Tappet
Duration At 050 Inch Lift236 int./236 exh.
Valve Springs RequiredYes
Vendor Part Number51-245-4
Package Qty1
Package TypeEA
No Questions
No Reviews

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