Xtreme Energy Mechanical Flat Camshaft Complete Kit Lift: .568"/.578"

Vehicle Info Needed

COMP CAMSPART NUMBER: 249-K11-677-4

Xtreme Energy Mechanical Flat Camshaft Complete Kit Lift: .568"/.578"

Name: Xtreme Energy Mechanical Flat Camshaft Complete Kit Lift: .568"/.578"
Brand: COMP CAMS
SKU: 249-K11-677-4
Price: 742.95 USD
Availability: InStock

^$742⁹⁵

Ships on 10/20/2026

Lowest Price Guarantee

Chevy Big Block 396-454ci 1965-96

Lift: .568"/.578"
Duration: 274°/280°
Lobe Separation Angle: 110°
RPM Range 2000-6400
Produces Better Throttle Response
Produces Top Engine Horsepower
Delivers Increased Engine Vacuum
1 Year Limited Warranty
Chevelle, Camaro, Corvette, Stingray, Silverado, C10, Firebird, Chevrolet, Big Block, Chevy, BBC, 454, 427, 502, 396, Caprice, Malibu, Impala, Nova, Monte Carlo, S10, 572

Very strong mid-range torque and throttle response, 2500+ 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 Kit

BrandCOMP CAMS

Package Height5.2

Package Width10.3

Package Length25.3

Weight26.4 PG

Part CategoryPerformance Parts

Exh. Duration @ .050 In. (Deg)242

Cam StyleMechanical flat tappet

Grind NumberCB XS274S-10

Exh. Duration Advertised (Deg)280

Locks IncludedYes

Engine Make/SizeChevy Big Block (396-454)

Retainers IncludedYes

Intake Valve Lift With Factory Rocker Arm Ratio (I0.568

Int. Duration @ .050 In. (Deg)236

Assembly Lubricant IncludedYes

Basic Operating Rpm Range2,000-6,400

Pushrods IncludedNo

Gaskets IncludedNo

Intake Valve Lash0.016 in (0.406 mm)

Rocker Arms IncludedNo

Intake Valve Lift0.568 in (14.427 mm)

Computer-Controlled CompatibleNo

Int. Duration Advertised (Deg)274

Lobe Separation (Deg)110

Rpm Range2000-6400

Lifter StyleMechanical flat tappet

Advertised Duration274 int./280 exh.

Exhaust Valve Lift With Factory Rocker Arm Ratio (0.578

Valve Springs IncludedYes

UsageStreet/Performance

Valve Lift With Factory Rocker Arm Ratio0.568 int./0.578 exh.

QuantitySold as a kit

Valve Stem Seals IncludedYes

Exhaust Valve Lash0.016 in (0.406 mm)

Exhaust Valve Lift0.578 in (14.681 mm)

Advertised Intake Duration274

Outside Diameter Of Outer Spring1.509 in (38.3 mm)

Intake Duration At 050 Inch Lift236

Exhaust Duration At 050 Inch Lift242

Timing Chain StyleDouble non-roller

Timing Chain And Gears IncludedYes

Advertised Exhaust Duration280

Lifter TypeMechanical Flat Tappet

Duration At 050 Inch Lift236 int./242 exh.

Valve Springs RequiredNo

Lifters IncludedYes

Vendor Part NumberK11-677-4

Package Qty1

Package TypeEA

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