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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-CL11-240-4
Comp Cams Xtreme Marine Hydraulic Flat Tappet Camshafts
$39795
Ships on 10/19/2026
Lowest Price GuaranteeChevy Big Block 396-454ci 1965-96
- Xtreme Marine Hyd. Flat Tappet Cam and Lifter Set
Chevy Big Block 396-454ci 1965-96
Lift: .564"/.566"
Duration: 278°/292°
Lobe Separation Angle: 112°
RPM Range: 2000-6200
*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.
Jet with 'A' impeller, needs improved intake, likes headers.
| Operating Range: | 2000-6200 RPM |
| Duration Advertised: | 278° Intake / 292° Exhaust |
| Duration @ .050' Lift: | 234° Intake / 244° Exhaust |
| Valve Lift w/1.7 Rockers: | .564' Intake / .566' Exhaust |
| Lobe Separation Angle: | 112° |
Chevelle, Camaro, Corvette, Stingray, Silverado, C10, Firebird, Chevrolet, Big Block, Chevy, BBC, 454, 427, 502, 396, Caprice, Malibu, Impala, Nova, Monte Carlo, S10, 572
Jet w/ A impeller, needs improved intake, likes 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.
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Part TypeCamshaft Kit
BrandCOMP CAMS
Package Height3.6
Package Width5.7
Package Length25.3
Weight14.85 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)237
Cam StyleHydraulic flat tappet
Grind NumberXM278H
Exh. Duration Advertised (Deg)292
Locks IncludedNo
Engine Make/SizeChevy Big Block (396-454)
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.564
Int. Duration @ .050 In. (Deg)234
Assembly Lubricant IncludedNo
Basic Operating Rpm Range2,000-6,200
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.564 in (14.326 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)278
Lobe Separation (Deg)112
Rpm Range2000-6200
Lifter StyleHydraulic flat tappet
Advertised Duration278 int./296 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.566
Valve Springs IncludedNo
UsageOEM
Valve Lift With Factory Rocker Arm Ratio0.564 int./0.566 exh.
Camshaft Gear Attachment3-bolt
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.566 in (14.376 mm)
Advertised Intake Duration278
Intake Duration At 050 Inch Lift234
Exhaust Duration At 050 Inch Lift244
Timing Chain And Gears IncludedNo
Advertised Exhaust Duration292
Lifter TypeHydraulic Flat Tappet
Part FitmentSemi Universal
Duration At 050 Inch Lift234 int./244 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberCL11-240-4
Package Qty1
Package TypeEA
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