Just received my JLUR 2.0T tonight and directly installed the Flowmaster 817837 Amercian Thunder axle back.
The first thing to note is that the flowmaster exhaust is super tight and I have not been able to complete properly the installation. The tube is really too tight and the last 2cm can't be reached.
I made a test in different situations. The sound is good, perfect for those who really want to hear the exhaust.
I come from sports car with loud sound, and for me this muffler delete is a little too much for the JL2.0.
For the price it is not bad, but I really would have prefer the same thing with an additional small resonator...