What's the diameter of STi 4-6 mid section?
 

Anyone knows if it's 2.5" or 3". Need to know in order to pick the right size downpipe to mate with it.

Also, could you please confirm, if you know, that these mid-sections have resonators but no cat in them?

What I am trying to do is to get a de-cat downpipe and mid-section to get the flow, but keep the noise level down.

Thanks!

Hi

Its 2.5" with a resonated section, no cat :)