I purchased and install the Borla touring - gmc version. I guess I'm getting old. After a week of driving, I put the stock back. I have it for sale. I'm LI if anyone interested.
Pretty straightforward install. Make sure to drop the side rail towards the cab on each side by1/16”-1/8. If you don't you will have a small gap and won't sit flush. I had to make an adjustment. Hit me up if you have any questions.