i just removed my 2 resonator for $40, with turbo xs dp/rp setup, it sound more like cobra....!!!
No drone at 2500 rpm? With the same setup and with both resos still in place it was (1) a lot louder and (2) making really bad drone at the exact rpm that most daily driving would take place. With a half hour commute in each direction, this was really producing headaches for me.
So, I inserted the third reso. But it was a big 3 inch very high flow straight through one. Maybe taking the other two out helps in some way to remove the drone, or maybe it does not bother you? But yes, the TurboXS catless dp/rp has some real bark to go along with its very noticable bite.