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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-11-651-47
Comp Cams Xtreme Energy Hydraulic Flat Tappet Camshafts
$37695
Ships on Sep 11, 2026
Lowest Price GuaranteeChevy 396-454ci Big Block 1965-96 4 & 7 Swap Firing Order
- Xtreme Energy Hydraulic Flat Tappet Camshaft with 18736542 Firing Order 4 & 7 swap firing order
Lift .574"/.578"
Duration 284°/296°
RPM Range 2300 to 6500
Hydraulic-Street/Strip, 2800+ stall, rough idle, 9.5:1 compression.
Chevelle, Camaro, Corvette, Stingray, Silverado, C10, Firebird, Chevrolet, Big Block, Chevy, BBC, 454, 427, 502, 396, Caprice, Malibu, Impala, Nova, Monte Carlo, S10, 572
Street/strip, 2800+ stall, rough idle, 9.5:1+ compression.
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 Width3.1
Package Length24.4
Weight10.6 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)246
Cam StyleHydraulic flat tappet
Exh. Duration Advertised (Deg)296
Engine Make/SizeChevy Big Block (396-454)
Intake Valve Lift With Factory Rocker Arm Ratio (I0.574
Int. Duration @ .050 In. (Deg)240
Basic Operating Rpm Range2,300-6,500
Intake Valve Lift0.574 in (14.58 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)284
Lobe Separation (Deg)110
Rpm Range2300-6500
Advertised Duration284 int./296 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.578
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.574 int./0.578 exh.
QuantitySold individually
Exhaust Valve Lift0.578 in (14.681 mm)
Advertised Intake Duration284
Intake Duration At 050 Inch Lift240
Exhaust Duration At 050 Inch Lift246
Advertised Exhaust Duration296
Lifter TypeMechanical Flat Tappet
Part FitmentSemi Universal
Duration At 050 Inch Lift240 int./246 exh.
Valve Springs RequiredYes
Vendor Part Number11-651-47
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
