Xtreme Energy Mechanical Flat Camshaft Lift: .488"/.501"
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COMP CAMSPART NUMBER: 249-12-676-4

Xtreme Energy Mechanical Flat Camshaft Lift: .488"/.501"

$30995
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Chevy Small Block 265-400ci 1955-98
    Xtreme Energy Mechanical Flat Camshaft
  • Lift: .488"/.501"
  • Duration: 268°/274°
  • Lobe Separation Angle: 110°
  • RPM Range 1600-6000

    *Note: In order to use these camshafts in 1955-57 265ci blocks, it is necessary to machine a small groove in the rear main journal of the cam to allow oil flow to the top of the engine.

    Great for street machines, largest cam for stock converters.

    Operating Range:1600-6000 RPM
    Duration Advertised:268° Intake / 274° Exhaust
    Duration @ .050' Lift:230° Intake / 236° Exhaust
    Valve Lift w/1.5 Rockers:.488' Intake / .501' Exhaust
    Valve Setting:.016' Intake / .016' Exhaust
    Lobe Separation Angle:110°

    265, 283, 307, 302, 305, 327, 350, 383, 400, 427, L46, L48, L65, LM1, LT-1, L82, L81, LS9, L83, L98, L05, LG3, LG4, LT1, LT4, Camaro, Corvette, Chevelle, Stingray, Silverado, C10, Firebird, Chevrolet, Chevy, Small Block Chevy, Caprice, Malibu, Impala, Nova, 355, GEN1, Monte Carlo, S10


    Great for street machines. Will work with stock converter, best with 2000 stall.

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 Height3.0
Package Width3.0
Package Length24.2
Weight8.75 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)236
Cam StyleMechanical flat tappet
Grind NumberCS XS268S-10
Exh. Duration Advertised (Deg)274
Engine Make/SizeChevy Small Block (262-400)
Intake Valve Lift With Factory Rocker Arm Ratio (I0.488
Int. Duration @ .050 In. (Deg)230
Basic Operating Rpm Range1,600-6,000
Intake Valve Lash0.016 in (0.406 mm)
Intake Valve Lift0.488 in (12.395 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)268
Lobe Separation (Deg)110
Rpm Range1600-6000
Advertised Duration268 int./274 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.501
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.488 int./0.501 exh.
QuantitySold individually
Exhaust Valve Lash0.016 in (0.406 mm)
Exhaust Valve Lift0.501 in (12.725 mm)
Advertised Intake Duration268
Intake Duration At 050 Inch Lift230
Exhaust Duration At 050 Inch Lift236
Advertised Exhaust Duration274
Lifter TypeMechanical Flat Tappet
Duration At 050 Inch Lift230 int./236 exh.
Valve Springs RequiredYes
Vendor Part Number12-676-4
Package Qty1
Package TypeEA
No Questions
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