Doug's header / tti exhaust issue

I have Doug’s headers in my Duster and had no issues matching them up with a Summit 2.5” exhaust.

Why did you go with Doug’s headers and a TTI exhaust? Seems like it would have been better to keep things matched up.
Local guy on here was selling the tti exhaust new in the box and couldn't pass up the deal! Tti header are more then Doug's headers! I called tti and they say we make exhaust to fit their headers! So your on your own with fitment on any other header!