Hello , I am need of some guidance and I would appreciate your input. I have a JoeZ catback exhaust installed on a 2013 is350 fsport. While the exhaust sounds great, after the mufflers warm up it tends to get on the louder drony side. How can I remedy this? Switch out the midpipe for the stock and keep the JoeZ axleback? I really wanted an f-sport axleback but they were out of stock. Thank you

 

Try adding some Holtz resonators.