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Pontiac 265-455ci 8 cyl. 1955-1981
- Xtreme Energy Retro-Fit XR276HR Hydraulic Roller Camshaft Small Kit
- Produces Better Throttle Response
- Produces Top Engine Horsepower
- Delivers Increased Engine Vacuum
- 1 Year Limited Warranty
Lift: .502''/.510''
Duration: 276°/282°
Lobe Separation Angle: 110°
RPM Range: 1800-5600
Part TypeCamshaft Kit
BrandCOMP CAMS
Package Height5.1
Package Width10.3
Package Length25.3
Weight20.2 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)230
Cam StyleHydraulic roller tappet
Grind NumberXR276HR-10
Exh. Duration Advertised (Deg)282
Locks IncludedNo
Engine Make/SizePontiac 265-455
Retainers IncludedNo
Intake Valve Lift With Factory Rocker Arm Ratio (I0.502
Int. Duration @ .050 In. (Deg)224
Assembly Lubricant IncludedNo
Basic Operating Rpm Range1,800-5,600
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.502 in (12.751 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)276
Lobe Separation (Deg)110
Rpm Range1800-5000
Lifter StyleHydraulic roller
Advertised Duration276 int./282 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.51
Valve Springs IncludedNo
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.502 int./0.510 exh.
QuantitySold as a kit
Valve Stem Seals IncludedNo
Exhaust Valve Lift0.51 in (12.954 mm)
Advertised Intake Duration276
Intake Duration At 050 Inch Lift224
Exhaust Duration At 050 Inch Lift230
Timing Chain StyleDouble non-roller
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration282
Lifter TypeHydraulic Roller
Duration At 050 Inch Lift224 int./230 exh.
Valve Springs RequiredYes
Lifters IncludedYes
Vendor Part NumberSK51-423-9
Package Qty1
Package TypeEA
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