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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-K51-413-9
Comp Cams 'Xtreme Energy' Hydraulic Roller Camshafts
$1,30399
Ships on 09/15/2026
Lowest Price GuaranteePontiac 265-455ci 8 cyl. 1955-1981
- Xtreme Energy Retro-Fit XR264HR Hydraulic Roller Camshaft Complete Kit
- Produces Better Throttle Response
- Produces Top Engine Horsepower
- Delivers Increased Engine Vacuum
- 1 Year Limited Warranty
Pontiac; Super Duty; SD; SD455; HO; 455 HO; Trans-Am; Catalina; Firebird; Formula; 421; 455; 400; 428; 350; 265; 301; 370; 389; 301; 287; 317; 347; Ram Air; Ram Air IV; Ram Air III; Bonneville; Grand Prix; LeMans; Parisienne; Grand Am; Century; Regal;
Lift: .487"/.495"
Duration: 264°/270°
Lobe Separation Angle: 110°
RPM Range: 1000-5000
Part TypeCamshaft Kit
BrandCOMP CAMS
Package Height5.0
Package Width10.5
Package Length26.0
Weight26.5 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)218
Cam StyleHydraulic roller tappet
Grind NumberXR264HR
Exh. Duration Advertised (Deg)270
Locks IncludedYes
Engine Make/SizePontiac 265-455
Retainers IncludedYes
Intake Valve Lift With Factory Rocker Arm Ratio (I0.487
Int. Duration @ .050 In. (Deg)212
Assembly Lubricant IncludedNo
Basic Operating Rpm Range1,000-5,000
Pushrods IncludedNo
Gaskets IncludedNo
Rocker Arms IncludedNo
Intake Valve Lift0.487 in (12.37 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)264
Lobe Separation (Deg)110
Rpm Range1000-5000
Lifter StyleHydraulic roller
Advertised Duration264 int./270 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.495
Valve Springs IncludedYes
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.487 int./0.495 exh.
QuantitySold as a kit
Valve Stem Seals IncludedYes
Exhaust Valve Lift0.495 in (12.573 mm)
Advertised Intake Duration264
Outside Diameter Of Outer Spring1.437 in (36.5 mm)
Intake Duration At 050 Inch Lift212
Exhaust Duration At 050 Inch Lift218
Timing Chain StyleDouble roller
Timing Chain And Gears IncludedYes
Advertised Exhaust Duration270
Lifter TypeHydraulic Roller
Part FitmentSemi Universal
Duration At 050 Inch Lift212 int./218 exh.
Valve Springs RequiredNo
Lifters IncludedYes
Vendor Part NumberK51-413-9
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
