[ajfoggy]

Originally Posted by E90Fleet

Sorry, that one was not out yet last I had access.
Will look next time again

The kit ending "409" in your last post is for all except M550 while the "410" one is for the M550

I went and triple checked the parts system.
If one looks at the M Performance exhaust tips on the parts system it says you need the 8 Cylinder cover from the M550

So looks like you need the "410" kit if you will be fitting the M Performance exhaust and its tips

Thanks for that.

So to sum things up.

Any model without M performance Exhaust = 409.

Any model WITH M Performance Exhaust & 550i = 410.

But you definitely need one wither 409/410 to fit the carbon diffuser. Talk about making things complicated by having a two piece diffuser with 3 different parts....