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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-11-246-3
Xtreme Energy 274H Hydraulic Flat Tappet Camshaft Only Lift: .552" /.555" Duration: 274°/286° RPM Range: 1800-6000
$29795
4 left in stock
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Lowest Price GuaranteeChevy 396-454ci Big Block 1965-96
- Xtreme Energy 274H Hydraulic Flat Tappet Camshaft Only
Lift: .552''/.555''
Duration: 274°/286°
RPM Range: 1800-6000
*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.
High performance street, very strong mid-range, with headers & 2500+ stall.
| Operating Range: | 1800-6000 RPM |
| Duration Advertised: | 274° Intake / 286° Exhaust |
| Duration @ .050' Lift: | 230° Intake / 236° Exhaust |
| Valve Lift w/1.7 Rockers: | .552' Intake / .555' 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
High performance street, very strong mid-range, with headers and 2200+ 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.
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Part TypeCamshaft
BrandCOMP CAMS
Package Height2.8
Package Width2.9
Package Length24.3
Weight10.8 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)236
Cam StyleHydraulic flat tappet
Grind NumberCB XE274H-10
Exh. Duration Advertised (Deg)286
Engine Make/SizeChevy Big Block (396-454)
Intake Valve Lift With Factory Rocker Arm Ratio (I0.552
Int. Duration @ .050 In. (Deg)230
Basic Operating Rpm Range1,800-6,000
Intake Valve Lift0.552 in (14.021 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)274
Lobe Separation (Deg)110
Rpm Range1800-6000
Advertised Duration274 int./286 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.555
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.552 int./0.555 exh.
QuantitySold individually
Exhaust Valve Lift0.555 in (14.097 mm)
Advertised Intake Duration274
Intake Duration At 050 Inch Lift230
Exhaust Duration At 050 Inch Lift236
Advertised Exhaust Duration286
Lifter TypeHydraulic Flat Tappet
Part FitmentSemi Universal
Duration At 050 Inch Lift230 int./236 exh.
Valve Springs RequiredYes
Vendor Part Number11-246-3
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
