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The DPs will have to come out, along with the tune, and probably intercooler. The most important thing is the tune and DPs: those are a no-go for CPO work. But I would recommend removing everything just to be sure. It's a PITA, but there's a risk that if you go with some mods, a marker will be placed on your VIN and uploaded to the BMW mothership, and then your warranty is done forever. We swap that stuff pretty reasonably and keep stock 'loaner' parts at the shop.
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