Been running a MBRP str8 turbo back w/ the deletes for almost two yrs., was thinking about throwing the muffler on just to hear the difference. It's just sitting in my garage collecting dust. Maybe i'll take some video of the difference between the twoI'm running mbrp now with cat delete and mbrp muffler
:whs: I have the same setup with CAT and muffler delete options it is cool that way, however I always run it with the muffler, same sound just not obnoxiously loudI would go with the MBRP that has the cat delete but uses the 4" muffler, it has a good sound and no drone. Let me know if I can help.