hello I have Arrow exaust that was bought to fit on a KTM 1090 adventure r, is there any chances I could fit it on the T7 without causing any issue ?

 

I’d just offer it up and see. I have a titanium arrow, great sounds.  It’s the pipe that will be wrong as it’s part of the can. Probably easier to sell it and get what you’re after.
Or cut the can and get a local stainless fabricator  guy to build you an awesome high level set up. 🤔😉