F87M2C tips are same as F80 m3 m4 but NOT F87 M2. See real oem for standard tips.
https://www.realoem.com/bmw/enUS/par...&q=18107853892
OG M2 are straight cut, don't know about diameter.
On ebay of course the term "fits" doesn't mean it's a perfect fit, just it fits, maybe badly though...