Brand new set of headstock taper roller bearings to fit:
BMW HP 4 (2011-2014).
BMW HP 4 Carbon (2011-2014).
This set of steering stem bearings is designed to replace 31427718392 on the above HP4 years and models.
Top and bottom headstock bearings included as seen in picture.
Both sized ID30 x OD55 x WTH17.
All sizes in mm