Noooooo ….. the CanBus can adapt easily to any exhaust change up ….. I’ve gone to straight out tail pipes and no re-tune necessary … she runs like a screaming demon … a LOUD screaming demon but no change in performance … maybe just a little quicker out of the hole … but no need to remap or dyno tune if all your doing is muffler swaps …. Have fun, many levels of pleasant noise available … your choice … now if your entering the TouristTrophy run you could probably use some fine tuning … ……………… StayUpOn2 …………….. Blitz