As suggested by a few members and the BMW part numbers, the F32 and F8X reflectors are indeed different. Yes, the sizing is very close, albeit not identical. IND began painting reflectors about 6 years ago when our clients were reporting fitment and finish issues from a company using an aftermarket mold (overseas manufacturing). At that point in time we decided to offer this service, but only if fitment was 100%, not 90%, but 100% on point with factory.
Below are some measurements taken from both the F32 and F8X reflector. I should also mention that there is a difference in the curvature of the reflectors, but this is hard to capture in photos. Looking at the photos of the F30 reflector posted by another member in this thread you can see that there is a noticeable depression at the top corner of the reflector. The differences in thickness and width between the two reflectors will result in a slightly larger gap than vehicle appropriate reflector.
We understand that there is a price difference associated with the two reflectors and assure members it is simply a more expensive core price. We are always looking out for Bimmerpost members and a recent example of this is the F32 performance front grill surround. We were the first to report the cross compatibility between the F32 surround and the F8X surround. As a result, we saved Bimmerpost members a couple hundred dollars. If we were able to sell the F3X reflectors and the fitment was 100%, we would have this as an option. Unfortunately, this is not the case.
If anyone has any further questions please don't hesitate to contact us directly.
F32/F8X M3/4. Left/Right, respectively.
F8X M3/M4 reflectors:
F32 M sport front reflectors:
