I'm trying to help someone out but they're getting conflicting info.....

Am I right in thinking that the std diameter for the bug and blob wrx is 2.5" from the bottom of the downpipe all the way through to the back?

What about sti???

Cheers

 

My hawk sti is 2.5" from the downpipe back, so I would imagine blob and bug are to.

 

Yes 2.5" OEM

 

Yeah just as I thought.

He has a Blitz Nur Spec r that's 2.5" but increases to 3"

He at first thought it was 3" all the way but after having a look it's 2.5" so it'll fit all wrx and sti that have 2.5" midpipe fitted.

I'm trying to convince the missus to fit it to her Wagon

 

Yeah alot of 3" down pipes narrow to 2.5" i have 3" all the way though.