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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-07-306-8
Comp Cams Xtreme Energy Hydraulic Roller Camshafts
$57795
Ships on 09/08/2026
Lowest Price GuaranteeChevy 350ci LT1 & LT4 1993-97
- Xtreme Energy 290HR-12 Hydraulic Roller Camshaft Only
Lift: .510''/.540''
Duration: 290°/307°
Lobe Separation Angle: 112°
RPM Range: 1800-5800
For use with LT1 modified computer, intake plenum, runners and 2500 stall converter.
| Operating Range: | 1800-5800 RPM |
| Duration Advertised: | 290° Intake / 307° Exhaust |
| Duration @ .050' Lift: | 230° Intake / 244° Exhaust |
| Valve Lift w/1.5 Rockers: | .510' Intake / .540' Exhaust |
| Lobe Separation Angle: | 112° |
SBC; Chevrolet; Chevy Small Block; Small Block Chevrolet; 305; 350; LT1; LT4; Chevelle; Camaro; Swap; Corvette; Bel Air; Z28; Z2/8; Duntov; Nova; Monaro; Firebird; Trans-Am; Pontac; C10; C20; K10; Blazer; S10; Monza; Ventura; Monte Carlo; Malibu; El Camino; Caprice; Vortec; SS
For use in LT1, with custom tuning, headers, gears, and 2200+ stall. Rough 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.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Part TypeCamshaft
BrandCOMP CAMS
Package Height2.8
Package Width3.0
Package Length24.3
Weight8.7 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)244
Cam StyleHydraulic roller tappet
Grind NumberLT1 290HR-12
Exh. Duration Advertised (Deg)307
Engine Make/SizeChevy LT1
Intake Valve Lift With Factory Rocker Arm Ratio (I0.51
Int. Duration @ .050 In. (Deg)230
Basic Operating Rpm Range1,800-5,800
Intake Valve Lift0.51 in (12.954 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)290
Lobe Separation (Deg)112
Rpm Range1800-5800
Advertised Duration290 int./307 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.54
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.510 int./0.540 exh.
QuantitySold individually
Exhaust Valve Lift0.54 in (13.716 mm)
Advertised Intake Duration290
Intake Duration At 050 Inch Lift230
Exhaust Duration At 050 Inch Lift244
Advertised Exhaust Duration307
Lifter TypeHydraulic Roller
Duration At 050 Inch Lift230 int./244 exh.
Valve Springs RequiredYes
Vendor Part Number07-306-8
Package Qty1
Package TypeEA
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