Well I’m to start off I’m going to get a muffler delete and was thinking of adding flow master resonators. I got a 3.7 Sport AWD q50This may be the vaguest post I’ve seen to date. What is your question? A muffler doesn’t need any resonators because it’s a muffler. Mid pipes and lower downpipes can benefit from resonators based on your “goals” which should be defined in order for us to help guide you in this community. You need to elaborate and be sure to include engine type as exhaust preferences vary wildly between the VR and VQ platforms.