From what i researched these were BMS old style tips that they discontinued since they replaced them with current design tips. If anything this thread helped them more leftover inventory lol.
It doesnt look like they designed slip on tips for F90 yet but i wouldn't be surprised if same modification process would apply to their current tips for F80/2/3, granted these are $279 vs $79 most of us paid.
Below is link to current tips if anyone wants to experiment.. i don't see why same concept would not work.. same diameter, dimension of tip etc.. if anything their newer tips would hide the F90 locking pins better and since these are not angle cut they will look straight cut no mater how you install them
http://www.burgertuning.com/billet_e...M4_M5_BMW.html