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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-11-717-9
Drag Race Mechanical Roller Camshaft Lift .714"/.714" Duration 304/312 RPM Range 4000-6800
$55895
3 left in stock
Ships on Sep 14, 2026
Lowest Price GuaranteeChevy 396-454ci Big Block 1965-96
- Drag Race Mechanical Roller Camshaft
Lift .714"/.714"
Duration 304/312
RPM Range 4000-6800
*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.
** Note: Requires upgraded gear, thrust button & wear plate.
Super Street / Super Gas, 427-454ci, 4500+ stall converter.
| Operating Range: | 4000-6800 RPM |
| Duration Advertised: | 304° Intake / 312° Exhaust |
| Duration @ .050' Lift: | 270° Intake / 276° Exhaust |
| Valve Lift w/1.7 Rockers: | .714' Intake / .714' Exhaust |
| Valve Setting: | .028' Intake / .030' Exhaust |
| Lobe Separation Angle: | 108° |
Chevelle, Camaro, Corvette, Stingray, Silverado, C10, Firebird, Chevrolet, Big Block, Chevy, BBC, 454, 427, 502, 396, Caprice, Malibu, Impala, Nova, Monte Carlo, S10, 572
Super Street. 4500+ stall, 11.5:1+ compression, 427-454.
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 Height2.7
Package Width3.0
Package Length24.4
Weight10.6 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)278
Cam StyleMechanical roller tappet
Grind NumberCB 304C-R8
Exh. Duration Advertised (Deg)312-5
Engine Make/SizeChevy Big Block (396-454)
Intake Valve Lift With Factory Rocker Arm Ratio (I0.714
Int. Duration @ .050 In. (Deg)270
Basic Operating Rpm Range4,000-6,800
Intake Valve Lash0.028 in (0.711 mm)
Intake Valve Lift0.714 in (18.136 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)304-5
Lobe Separation (Deg)108
Rpm Range4000-6800
Advertised Duration304 int./312 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.714
UsageStrip
Valve Lift With Factory Rocker Arm Ratio0.714 int./0.714 exh.
QuantitySold individually
Exhaust Valve Lash0.03 in (0.762 mm)
Exhaust Valve Lift0.714 in (18.136 mm)
Advertised Intake Duration304
Intake Duration At 050 Inch Lift270
Exhaust Duration At 050 Inch Lift278
Advertised Exhaust Duration312
Lifter TypeMechanical Roller
Part FitmentSemi Universal
Duration At 050 Inch Lift270 int./278 exh.
Valve Springs RequiredYes
Vendor Part Number11-717-9
Package Qty1
Package TypeEA
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