Advertised Exhaust Duration

:

315

Advertised Intake Duration

:

283

Amazon Asin

:

B005H89W0Y

Assembly Lubricant Included

:

Yes

Basic Operating Rpm Range

:

2,200-4,200

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

:

Solid Flat Tappet

Camshaft Material

:

Cast Iron

Camshaft Series

:

Classic Thumpr

Engine Family

:

Flathead Ford (2 Gear) 239, 255 c.i. 8 Cylinder (1949-1953)

Exhaust Duration At .050 Inch Lift

:

257

Exhaust Valve Lift

:

0.378

Grind Number

:

295TS7

Intake Duration At .050 Inch Lift

:

243

Intake Valve Lift

:

0.382

Lifter Type

:

Solid Flat Tappet

Lifters Included

:

No

Lobe Separation

:

107

Title

:

Classic Big Mutha' Thumpr 243/257 Solid Flat Cam for Flathead Ford 239/255

Valve Springs Required

:

Yes