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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-11-607-5
Comp Cams Magnum Mechanical Flat Tappet Camshafts
$32595
Ships on 10/19/2026
Lowest Price GuaranteeChevy 396-454ci Big Block 1965-96Marine
- Magnum Marine 320B Mechanical Flat Tappet Camshafts
Lift: .638"/.656"
Duration: 320°/324°
Lobe Separation Angle: 110°
RPM Range 4500-7500
Solid-For use in large engine. Flat or hydro. Use tunnel ram. 11.5:1 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
For use in large engine. Flat or hydro. Use tunnel ram. 11.5:1+ 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 Height2.75
Package Width2.87
Package Length24.5
Weight10.0 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)286
Cam StyleMechanical flat tappet
Grind NumberCB 320B-10
Exh. Duration Advertised (Deg)324
Engine Make/SizeChevy Big Block (396-454)
Intake Valve Lift With Factory Rocker Arm Ratio (I0.638
Int. Duration @ .050 In. (Deg)280
Basic Operating Rpm Range4,500-7,500
Intake Valve Lash0.028 in (0.711 mm)
Intake Valve Lift0.638 in (16.205 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)320
Lobe Separation (Deg)110
Rpm Range4500-7500
Advertised Duration320 int./324 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.656
UsageMarine
Valve Lift With Factory Rocker Arm Ratio0.638 int./0.656 exh.
QuantitySold individually
Exhaust Valve Lash0.03 in (0.762 mm)
Exhaust Valve Lift0.656 in (16.662 mm)
Advertised Intake Duration320
Intake Duration At 050 Inch Lift280
Exhaust Duration At 050 Inch Lift286
Advertised Exhaust Duration324
Lifter TypeMechanical Flat Tappet
Duration At 050 Inch Lift280 int./286 exh.
Valve Springs RequiredYes
Vendor Part Number11-607-5
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
