I never installed the Boomba, read reviews that it was much stiffer than the Cobb and decided to go Cobb since it's a daily driver. The Cobb mount works great and only has slight vibration which I like.
I REALLY like my Injen CBE, it sounds great and pops. Warning though: tons of drone from 75MPH+, below 75MPH drone is very minimal. I am still on stock downpipe though. If I had to do it again I would get the Raw Unfinished top instead of the Burnt Titanium. The blue finish on the tip wore away really quickly. Install was very easy and fitment was great. I did get the upgraded mount bushings.