Beautiful car! Congratulations.
Any reason you went with ACS instead of Dinan springs + bump stops? I'm looking into lowering my 435 xDrive but reading mixed reviews, might just go with coilovers.
Also, what tires did it come with? The stock Continental runflats are pretty bad
Switch to something better once they wear out.
I installed MPE couple of months back and I'm loving it, it sounds way sportier and I can even hear the burbles inside the cabin which I never heard before. Thought about getting MPPK also but $1700 - $1800 (including install) for 35hp didn't feel right. I was able to install the MPE irrespective of MPPK but I think for you it has to be the whole MPPSK. Nevertheless, you will love the sound of the new exhaust. Here's a video I recorded just days after installing the exhaust, it has gotten better since then, takes about 1k miles to break in.
https://f30.bimmerpost.com/forums/sh....php?t=1607693