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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-12-239-3
'Xtreme 4x4' Hydraulic Flat Tappet Camshaft
$23836$297.95You Save$59.59
Ships on 09/08/2026
Lowest Price GuaranteeChevy 262-400ci Small Block 1955-98
- Xtreme 4x4 X4262H Hydraulic Flat Tappet Camshaft
Lift: .462''/.480''
Duration: 262°/270°
Lobe Separation Angle: 111°
RPM Range: 1300-5600
*Note: In order to use these camshafts in 1955-57 265ci blocks, it is necessary to machine a small groove in the rear main journal of the cam to allow oil flow to the top of the engine.
Excellent response, good mid-range, noticeable idle.
| Operating Range: | 1300-5600 RPM |
| Duration Advertised: | 262° Intake / 270° Exhaust |
| Duration @ .050' Lift: | 218° Intake / 226° Exhaust |
| Valve Lift w/1.5 Rockers: | .462' Intake / .480' Exhaust |
| Lobe Separation Angle: | 111° |
265, 283, 307, 302, 305, 327, 350, 383, 400, 427, L46, L48, L65, LM1, LT-1, L82, L81, LS9, L83, L98, L05, LG3, LG4, LT1, LT4, Camaro, Corvette, Chevelle, Stingray, Silverado, C10, Firebird, Chevrolet, Chevy, Small Block Chevy, Caprice, Malibu, Impala, Nova, 355, GEN1, Monte Carlo, S10
Excellent response, good mid-range, noticeable idle.
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
Weight8.74 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)226
Cam StyleHydraulic flat tappet
Grind NumberCS X4 262H-11
Exh. Duration Advertised (Deg)270
Engine Make/SizeChevy Small Block (262-400)
Intake Valve Lift With Factory Rocker Arm Ratio (I0.462
Int. Duration @ .050 In. (Deg)218
Basic Operating Rpm Range1,300-5,600
Intake Valve Lift0.462 in (11.735 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)262
Lobe Separation (Deg)111
Rpm Range1300-5600
Advertised Duration262 int./270 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.48
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.462 int./0.480 exh.
QuantitySold individually
Exhaust Valve Lift0.48 in (12.192 mm)
Advertised Intake Duration262
Intake Duration At 050 Inch Lift218
Exhaust Duration At 050 Inch Lift226
Advertised Exhaust Duration270
Lifter TypeHydraulic Flat Tappet
Part FitmentSemi Universal
Duration At 050 Inch Lift218 int./226 exh.
Valve Springs RequiredYes
Vendor Part Number12-239-3
Package Qty1
Package TypeEA
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