I can say with a fair degree of confidence, what you are trying to do won't work.
Although they look pretty close, there are differences in the ducting parts. I had 335is ducts, they do not fit the prelci m sport bumper for example. People make them fit but it's not correct on the back side, they use zip ties etc.
I had to source the ppkv2 ducting for a prelci as well as the passenger side oil cooler duct. These are all hard to source parts and none of the lci parts would fit the prelci bumper so I'd just guess it won't fit. I wasted a decent amount on the assumption there were some carry overs from the prelci bumper but I found none really. So if that fits, I'd be surprised.
Besides, why do you want those holes?.I've seen bolts from the freeway get wedged inside the grating of that grill, so I don't mind it blocking debris
Brake ducts or oil cooler ducts?
The lower mesh looks like it’s exactly the same shape whereas the oil cooler/ fog light ducts are visibly a different shape. I dont mind coming up with a solution for the ducting in any case if that’s the issue. I want it purely for cosmetic reasons. I much rather have openings where the brake ducts are. Just looks better IMHO. It’s not an expensive part so i might just eBay it and hope for the best... Unless someone can tell me definitively.