Advertised Exhaust Duration

:

311

Advertised Intake Duration

:

291

Amazon Asin

:

N/A

Assembly Lubricant Included

:

No

Basic Operating Rpm Range

:

2,200-6,200

C.a.r.b. E.o. Number

:

N/A

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.

C.a.r.b. Exemption Reason

:

N/A

California Proposition 65

:

WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov

Cam Type

:

Hydraulic Roller

Camshaft Gear Attachment

:

3-Bolt

Camshaft Material

:

Billet Steel

Camshaft Series

:

Thumpr 4 and 7 Swap Firing Order

Engine Family

:

Chevrolet 348-409 c.i. 8 Cylinder (1958-1965)

Exhaust Duration At .050 Inch Lift

:

249

Exhaust Valve Lift

:

0.558

Grind Number

:

47S 291MTHR-8

Intake Duration At .050 Inch Lift

:

235

Intake Valve Lift

:

0.574

Lifter Type

:

Hydraulic Roller

Lifters Included

:

No

Lobe Separation

:

108

Title

:

Mutha' Thumpr 4/7 Swap 235/249 Hydraulic Roller Cam for Chevrolet 348-409

Valve Springs Required

:

Yes