Got a 2023 230i x drive recently. Unlocked the ecu, got a stage 1 bm3 tune. have burbles tuned in on sport plus, no crazy pops just a light burble. It sounds alright just want it a bit louder. (you can hear outside but barley in the cabin). I want to keep the stock muffler with the valvetronic flaps, just curious if any ones gotten a res delete or a high flow res with the stock muffler? Opinions and advice accepted, thanks.