I was woundering what the size of the Cat on an 87 lb9 auto 3" in and 2.5" out. I'm going to remove the cat will a strigh piece of 3" pipe work?

 

i beleive its 2.5

 

Farm & Fleet = test pipe. (At least they USED to have them available.)

[This message has been edited by Vader (edited May 20, 2001).]

 

It is the "3 inch" factory cat. In reality it is 3" in, w/ a little over 2 3/4" out because of the slight neck down for the I-pipe to mate up with.

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Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray