I'm very happy with the MHC CF front and rear spoiler that I got from R44. Really fast shipping and the quality is great. I think the MHC parts appear to be manufactured in the UK.
I ordered the full CF mirror covers from XXII, but haven't received them yet. I got an email from them on Friday stating that they had a fitment issue with the drivers side so they're remaking that one. It feels positive that they didn't just ship me something that they knew I was going to have an issue with. Others on the forum have had a positive experience them as well which is why I gave them a shot on the mirror covers. I'll report back once I get them.
I have the Autotechnic front mud flaps and front seat headrest covers that I got from IND. The passenger seat cover has a very small imperfection that I just decided to live with. Most people won't see it and I'm never in the back seat.
I also just ordered the OEM CF side badges from Schmiedmann for roughly $400 less than I could get anywhere else. They haven't shipped yet either.
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2022 M3 Comp BGM/Fiona Red, Executive, Drivers Assistant Pro, Parking Assist, 826M black wheels
(SOLD) 2018 M2 BSM LCI, DCT, Executive, Drivers Assist, CarPlay