I hear the 20" resonators do a better job. Thats what I’d like to give a try one day.
make your own, just make it get progressively larger as it goes back, like you start at 2.25" and end at 3", don’t use resonators, if you can get some straight in-out mufflers without tips on them so you can use them in sequence, put one in the middle and one at the back, at least 3ft. between if you can with another diameter step-up or two
I’ve done shit like that on other loud cars… works on the principle that you reduce the velocity at the far end without causing obstruction
we have a blitz realize TT in stock. quiet and HAWT