I have the Borla touring exhaust and really like it. Mainly purchased it due to price over GM. Stealer-ship wanted $2200 , while the Borla was $1500 installed locally. Definitely notice a slight drone at 65-70 but I'm getting used to it. I've got 1,000 miles on it and seems like the tones of the exhaust are getting better. Noticeable difference when i switch from touring to sport mode, which is great.