So Sunroofcuda's offer to build you a set of resonators that are 3.5" body was not sufficient? He gave sound advice, and your YELP dude muffler shop is an idiot because the factory did install resonators to get rid of the drone!
You keep asking questions for answers you are seeming to ignore. Just cut the friggin tail pipes off, move the mufflers forward, install the resonators and extend the tail pipes past the bumper.
1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!