Comp Cams Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Pontiac 265-455 - 51-602-5
Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Pontiac 265-455
PRODUCT NOTES:
Camshaft Series - Thumpr
Usage - Street/Strip
Cam Type - Hydraulic Flat Tappet
Grind Number - 295TH7
Basic Operating RPM Range - 2,500-6,400 R3
Intake Duration at .050 Inch Lift - 243 DD
Exhaust Duration at .050 inch Lift - 257 DD
Advertised Intake Duration - 295 DD
Advertised Exhaust Duration - 313 DD
Lobe Separation - 107 DD
Intake Valve Lift - 0.501 IN
Exhaust Valve Lift - 0.486 IN
Lifters Included - No
Valve Springs Required - Yes
Assembly Lubricant Included - Yes
Camshaft Gear Attachment - 1-Bolt
Camshaft Material - Cast Iron
Cam and Lifter Kit Upgrade - CL51-602-5
K-Kit Upgrade - K51-602-5
Lifter Type - Hydraulic Flat Tappet
California Proposition 65 - WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
Title - Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Pontiac 265-455
Amazon ASIN - B005H89S1C
C.A.R.B. Exempt for Racing and Off-Road Only Vehicles? - Yes, but must be a race/competition only 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 California Certified Vehicles Manufactured Before 1965? - 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. Exemption Reason - N/A
C.A.R.B. E.O. Number - N/A
Engine Family - Pontiac 265-455 C.I. 8 Cylinder (1955-1981)
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