Xtreme Energy Mechanical Roller Camshaft Small Kit Big Block Chevy 1965-96 Lift: .646"/.653"
InfoVehicle Info Needed
COMP CAMSPART NUMBER: 249-SK11-771-8

Xtreme Energy Mechanical Roller Camshaft Small Kit Big Block Chevy 1965-96 Lift: .646"/.653"

$1,30995
ShippingShips on 09/15/2026
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Chevy 396-454ci Big Block 1965-96
    Xtreme Energy Mechanical Roller Camshaft Small Kit
    Big Block Chevy 1965-96
  • Lift: .646"/.653"
  • Duration: 280°/286°
  • Lobe Separation Angle: 110°
  • RPM Range: 2500-6500

    *Note: In order to use these camshafts in 1965-66 396/427ci blocks, it is necessary to machine a 3/16' wide x 7/64' deep groove in the rear main journal of the cam to allow oil flow to the top of the engine.

    ** Note: Requires thrust button & wear plate.

    Best in street machines with 2800+ stall converter, 10:1 or more compression with 3.73-3.90 gears.

    Operating Range:2500-6500 RPM
    Duration Advertised:280° Intake / 286° Exhaust
    Duration @ .050' Lift:242° Intake / 248° Exhaust
    Valve Lift w/1.7 Rockers:.646' Intake / .653' Exhaust
    Valve Setting:.016' Intake / .018' Exhaust
    Lobe Separation Angle:110°

    Chevelle, Camaro, Corvette, Stingray, Silverado, C10, Firebird, Chevrolet, Big Block, Chevy, BBC, 454, 427, 502, 396, Caprice, Malibu, Impala, Nova, Monte Carlo, S10, 572


    Best in street machines with 2800+ stall, 10:1+ compression with 3.73-3.90 rear gears.

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 Height5.2
Package Width10.3
Package Length25.3
Weight20.69 PG
Part CategoryPerformance Parts
UsageStreet/Performance
Intake Valve Lift0.646 in (16.408 mm)
Int. Duration Advertised (Deg)280
Exh. Duration @ .050 In. (Deg)248
Rpm Range2500-6500
Lifter TypeMechanical Roller
Exh. Duration Advertised (Deg)286
Part FitmentSemi Universal
Engine Make/SizeChevy Big Block (396-454)
Int. Duration @ .050 In. (Deg)242
Exhaust Valve Lift0.653 in (16.586 mm)
Vendor Part NumberSK11-771-8
Package Qty1
Package TypeEA
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