Just got off the phone with Stebro. I have some good news!
The exhaust is going to be made using 439 aviation grade steel!
I also talked about the x-pipe placement and they told me if thats not the place to put it then they will put an x-pipe where its supposed to be
So this system will be built right!
About the cats the price is kinda high I have been told that its gonna be $275 Canadian for each unit installed
Thats about 183 U$... I'll try to go in on friday and talk to them about the price of the cats it seems a bit high.
Anyhow, I hope this helps let me know if you have any other questions