BMW M4 GT4 EVO / M2 CS Racing Rear Hub Upgrade Kit

BMW F8X M2/M3/M4, M2 CS Racing, M4 GT4
 
BMW has enhanced the rear hub flange on the M4 GT4 models as part of the 2021 EVO pack in response to the discovery of cracks in the factory production flanges.
The upgraded flanges boast increased thickness overall and eliminate the tabbed hubcentric lip found in the original production series piece. While the occurrence of cracks on M2/M3/M4 cars driven on the track is not cause for alarm and not classified as a defect, we highly recommend a two-pronged approach: a) regularly inspect your rear flanges throughout the season, and b) consider replacing the production flange with this robust Motorsport component.
The revised Motorsport part features a comprehensive hubcentric mounting surface, thereby reducing stress.
 
It's important to note that despite being an improved part from BMW Motorsport with enhanced durability compared to the original, it is not impervious to stress, cracks, and potential failures.
 
This kit also includes the newly introduced Motorsport wheel bearings. These high-performance bearings utilize a larger ball bearing and are equipped with top-tier grease. While the Motorsport bearings are not mandatory. We can supply also OEM bearings. 
 
For heavily tracked or endurance racing cars, we strongly recommend the Motorsport bearings, although anything below that level of intensity should suffice with the OEM bearings.
 
What is included?
2 x BMW Motorsport rear hub flange (thicker and stronger rear lip design)
2 x BMW Motorsport rear wheel bearings (larger bearings with high performance grease)
2 x outer collar nuts
8 x bearing mounting screws
 
BMW Fitments:
2 Series
F87 (16-18) > M2
F87 (19-21) > M2 Competition
F87 (20-21) > M2 CS Racing
3 Series
F80 (15-19) > M3
4 Series
F82 / F83 (15-21) > M4
F82 (19-21) > M4 CS
F82 (15-21) > M4 GT4