Resonator Delete
I just wanted to share some feedback in case others are considering this. I currently have a 2013 M5 with ERace mufflers. I decided today to have the resonators removed and straight pipes added. On my drive home I would say noise increased from a 7 to 8. You can really only tell when in the higher RPM range. The biggest difference I felt was when I got home and revved the engine a few times in the garage. It seemed significantly louder.
I'm glad I did it for $200. Also I was able to get a good look under the car and I'm happy I did not spring for the Eisenmann mid pipes. Stock exhaust is very free flowing and large. $200 vs $2200 seems like a good decision to me to get virtually the same thing.
Thanks to everyone for all the information on here that made me try this out.
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