[StarrySky]

Hello,
I have a question on the M Performance Part (ZK7) M performance Rear Trim.
I have scoured the forums for 2021 M550i but haven’t gotten a definitive answer.
Can I ask what it is?
Is it just the black rear bumper instead of the normal grey one?

[Beerflakes]

Yeah, I believe so. It’s required if you option the CF diffuser.

That being said, I had issues adding the CF diffuser (and rear trim piece) to my 2021 order for some reason. My CA wasn’t able to add it himself, and had to reach out to his rep. His rep added it to the build, but it mysteriously dropped off several days later — even though my other M parts did not (mirror caps and spoiler).

[StarrySky]

Originally Posted by Beerflakes

Yeah, I believe so. It’s required if you option the CF diffuser.

That being said, I had issues adding the CF diffuser (and rear trim piece) to my 2021 order for some reason. My CA wasn’t able to add it himself, and had to reach out to his rep. His rep added it to the build, but it mysteriously dropped off several days later — even though my other M parts did not (mirror caps and spoiler).

I see.. that is strange.
Did you just go ahead with your order?
My CA isn’t able to find the CF diffuser and I have the ZK7 on my build, hope it stays.
Looked up on IND and it’s $1500 for that CF diffuser.

[Beerflakes]

I went ahead with only CF mirrors and spoiler. Be careful ordering those parts — I’ve been told the bumper part number for LCI g30 (2021) changed, so a lot of diffuser parts out there may not actually fit.

This is very likely why the diffuser and trim pieces got removed from my build.

[Beerflakes]

FYI here's what my build print-off looked like with the diffuser and trim piece before it dropped off.

[J50]

Originally Posted by Beerflakes

I went ahead with only CF mirrors and spoiler. Be careful ordering those parts — I’ve been told the bumper part number for LCI g30 (2021) changed, so a lot of diffuser parts out there may not actually fit.

This is very likely why the diffuser and trim pieces got removed from my build.

That’s what I did, the rear diffuser is a bit more aggressive on the 21. So didn’t bother with CF one.