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COMP CamsMore from COMP Cams

COMP Cams Big Mutha' Thumpr 243/257 Hydraulic Roller Cam and Lifter Kit for Pontiac 265-455

Part # CL51-602-11

Description

CL-KIT - Cam and Lifter Kit Includes: Camshaft, Lifters, Assembly Lube, Decals and Instructions.

Specifications

Advertised Exhaust Duration319 deg
Advertised Intake Duration299 deg
Assembly Lubricant IncludedNo
Basic Operating RPM Range2,300-6,100 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 TypeHydraulic Roller
Camshaft Gear Attachment1-Bolt
Camshaft MaterialBillet Steel
Camshaft SeriesThumpr
Engine FamilyPontiac 265-455 C.I. 8 Cylinder (1955-1981)
Exhaust Duration at .050 inch Lift257 deg
Exhaust Valve Lift0.519 in
Grind Number299THR7
Intake Duration at .050 Inch Lift243 deg
Intake Valve Lift0.532 in
K-Kit UpgradeK51-602-11
Lifter TypeHydraulic Roller
Lifters IncludedNo
Lobe Separation107 deg
UsageStreet/Strip
Valve Springs RequiredYes
UPC / GTIN00036584382195