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I have a Racechip on my 21 X3MC. I don’t have a midpipe but I understand it gives a few hp. I installed the Racechip myself and the sensor behind the wheel takes a whole lot of patience but it’s doable. I also installed BMC air filters while the air intake was out simultaneously taking out the charcoal filters. In all, the mods give a noticeable jump in power. But it mimics the factory’s power delivery. If you’re expecting the down low shove of an M5 you’ll be disappointed. But as it revs out you notice you’ve made pretty significant power gains. I too wanted a flash tune but as you note I’m not chancing the shady way of getting it for the 2021+ DMEs. But if a flash becomes available that I can install via my laptop I’d definitely research it. But for now the Racechip is worth the money (and aggravation of that sensor)
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