If somebody could help me, what is the diameter of the following pipes, both sides.
Spoon 4-2-1 Header
Carsound Cat
Type One B Pipe (not sure how many pipes)
and the Spoon N1 Muffler.
Also, how well is this set-up and is there anything I could change to make it better? Any info appreciated. Thanks alot.

 

inner or outer? which model cat?


[Modified by Type Goch, 12:17 AM 2/1/2002]

 

What exactly do you mean by inner/outer? Also, isnt there a specific Cat for the ITR..? or am i mistaken...

 

you are going t need a 2.5"ID cat for the 2.5" primary of the spoon 421. i think the cat that you are lookign for, or at least the one that everyone here uses is the carsound 94006.