Is your stinger a 18-21 of 22+ model? The 22+ have valves so drone and rasp will be less with valves closed. I have a 23 with ark dp. Even with tips valve open there will be rasp and drone but everyone has different tolerance. In beginning the drone and booming/tinning sound was pretty brutal not gonna lie but after some weeks it became less. You definitely want to use tips to reduce in cabin noise, they make a pretty noticable difference. This combo is really loud in person. Videos do not do justice to how loud it is, but it is a very pleasant deep raw and loud tone kinda similar to a GTR. If you are tuned it will slightly change the exhaust tone when you get into boost. Gets really loud and screams.
I did try the mbrp resonators and really didn't like them. Made it far too quiet and took away some unique frequencies/tones it had without resonators. I am going to get a custom 2.5 inch secondaries merged into 3 inch mid pipe to the mbrp pro active mufflers done soon to give it more of a GTR tone and less rasp/drone. This fabricator i know makes his own unique GTR sounding exhaust for stingers but its built in house.
If you want to get an idea of rasp and drone I have some videos I can share:
Cold start with some revs:
Pull with jb4:
Driving with jb4:
Some driving before jb4:
Hope that helps! Of course a 18-21 will be different since you do not have valves but I would think that won't be as loud as my setup since it goes thru the bigger mufflers entirely. The new mbrp pro active has a seperate straight pipe valve that I really like as the new design. My favorite exhaust on stinger by far. I had the non actice mbrp before and it just was not loud enough with the stock secondaries to me. Oh as far as tips, on the 22+ stingers you want a 5 inch 130mm outlet oval tip with 2.5 inch inlet 63mm.
I took some pictures showing difference between 4.5 inch that will likely fit a 18-21 better vs 5 inch ones here:
