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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-08-408-8
Comp Cams Xtreme Energy Hydraulic Roller Camshafts
$57795
Ships on 09/08/2026
Lowest Price GuaranteeChevy 305-350ci Small Block 1987-98
For engines originally equipped with a hydraulic roller camshaft, except LT1 and LT4.
For engines originally equipped with a hydraulic roller camshaft, except LT1 and LT4.
- Xtreme Energy XR258HR Hydraulic Roller Camshaft (CARBURETED)
Lift: .480''/.487''
Duration: 258°/264°
Lobe Separation Angle: 110°
RPM Range: 1000-5000
Strong torque, good mileage, stock to mildly modified combinations.
| Operating Range: | 1000-5000 RPM |
| Duration Advertised: | 258° Intake / 264° Exhaust |
| Duration @ .050' Lift: | 206° Intake / 212° Exhaust |
| Valve Lift w/1.5 Rockers: | .480' Intake / .487' Exhaust |
| Lobe Separation Angle: | 110° |
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
Strong torque, good mileage, stock to mildly modified combinations.
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 Height2.9
Package Width2.9
Package Length24.4
Weight8.86 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)212
Cam StyleHydraulic roller tappet
Grind NumberCS XR258HR-10
Exh. Duration Advertised (Deg)264
Engine Make/SizeChevy Small Block (262-400)
Intake Valve Lift With Factory Rocker Arm Ratio (I0.48
Int. Duration @ .050 In. (Deg)206
Basic Operating Rpm Range1,000-5,000
Intake Valve Lift0.48 in (12.192 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)258
Lobe Separation (Deg)110
Rpm Range1000-5000
Advertised Duration258 int./264 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.487
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.480 int./0.487 exh.
QuantitySold individually
Exhaust Valve Lift0.487 in (12.37 mm)
Advertised Intake Duration258
Intake Duration At 050 Inch Lift206
Exhaust Duration At 050 Inch Lift212
Advertised Exhaust Duration264
Lifter TypeHydraulic Roller
Duration At 050 Inch Lift206 int./212 exh.
Valve Springs RequiredYes
Vendor Part Number08-408-8
Package Qty1
Package TypeEA
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