After market intermediate pipe bolt to stock 2.25" catback?

[BlownStangGT]

I had a friend brother try to install a off road x pipe to his stock catback and they said it didnt work to good...it fit, but for some reason it leaked alot because of the pipe size going from 2.5" to 2.25"....reason I ask is my car has the stock 2.25" piping, but the previous owner welded in flows not that long ago, so I kinda wanna make sure of the stock/flow catback instead of spending $400 for a new one...will I be ok?

 

[BlownStangGT]

ttt

 

[srothfuss]

Do you already have the X-pipe?

I would suguest that you take it to your local muffler shop and have them weld it to your intermediate (flow) pipes like the previous owner.

If you got a ball / socket style connector you probably won't have any problems with exhaust leaks... But if you do, just take $20.00 down to the muffler shop and have them seal it up for you