Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededCOMP CAMSPART NUMBER: 249-11-677-20
XTREME ENERGY 274H Hydraulic Flat Tappet Camshaft Lift .568"/.578" Duration 274°/280° Lobe Angle 110°
$42295
Ships on Oct 28, 2026
Lowest Price GuaranteeCurrently Unavailable
This product is currently not available. Please call customer service for assistance at 1-800-345-4545.
Chevy 396-454ci Big Block 1965-96
- XTREME ENERGY 274H Hydraulic Flat Tappet Camshaft
- Nitrided
- SOLID - Very strong mid-range torque and throttle response
- 2500+ stall
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. Nitrided.
Lift .568"/.578"
Duration 274°/280°
Lobe Angle 110°
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 Height2.75
Package Width3.0
Package Length24.5
Weight11.18 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)242
Cam StyleMechanical flat tappet
Grind NumberXS274S
Exh. Duration Advertised (Deg)280
Engine Make/SizeChevy Big Block (396-454)
Intake Valve Lift With Factory Rocker Arm Ratio (I0.568
Int. Duration @ .050 In. (Deg)236
Basic Operating Rpm Range2,000-6,400
Intake Valve Lash0.016 in (0.406 mm)
Intake Valve Lift0.568 in (14.427 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)274
Lobe Separation (Deg)110
Rpm Range2000-6400
Advertised Duration274 int./280 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.578
UsageStreet/Strip
Valve Lift With Factory Rocker Arm Ratio0.568 int./0.578 exh.
Camshaft Gear Attachment3-bolt
QuantitySold individually
Exhaust Valve Lash0.016 in (0.406 mm)
Exhaust Valve Lift0.578 in (14.681 mm)
Advertised Intake Duration274
Intake Duration At 050 Inch Lift236
Exhaust Duration At 050 Inch Lift242
Advertised Exhaust Duration280
Lifter TypeHydraulic Flat Tappet
Duration At 050 Inch Lift236 int./242 exh.
Valve Springs RequiredYes
Vendor Part Number11-677-20
Package Qty1
Package TypeEA
No Questions
No Reviews
Some parts are not legal for use in California or other states with similar laws / regulations
