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COMP Cams Mutha' Thumpr 235/249 Hydraulic Roller Cam for Oldsmobile 260-455

Part # 42-601-11

Description

Mutha' Thumpr 235/249 Hydraulic Roller Cam

Specifications

Advertised Exhaust Duration311 deg
Advertised Intake Duration291 deg
Assembly Lubricant IncludedNo
Basic Operating RPM Range2,000-5,800 RPM
C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?Yes, but must meet tailpipe emission standards for year of vehicle.
C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?Yes, but must meet tailpipe emission standards for year of vehicle.
C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?Yes, but must meet tailpipe emission standards for year of vehicle.
C.A.R.B. Exempt for On-Road Vehicles?No
C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?Yes, but must be a race/competition only vehicle.
Cam and Lifter Kit UpgradeCL42-601-11
Cam TypeHydraulic Roller
Camshaft Gear Attachment1-Bolt
Camshaft MaterialBillet Steel
Camshaft SeriesThumpr
Engine FamilyOldsmobile 260-455 c.i. 8 Cylinder (1967-1990)
Exhaust Duration at .050 inch Lift249 deg
Exhaust Valve Lift0.532 in
Grind Number291THR7
Intake Duration at .050 Inch Lift235 deg
Intake Valve Lift0.54 in
K-Kit UpgradeK42-601-11
Lifter TypeHydraulic Roller
Lifters IncludedNo
Lobe Separation107 deg
UsageStreet/Strip
Valve Springs RequiredYes
UPC / GTIN00036584312970