Aftermarket BMW M3 and M4 grilles and bumper set for production

German aftermarket specialist, Prior Design, has taken the wraps off - via YouTube - its in-house redesigned front grille and bumper for the newly-released BMW M3 and M4 siblings. The M halo cars aroused much controversy when revealed to the public earlier this year, the large, vertical kidney grille dominating the front fascia and drawing criticism from car enthusiast and automotive media alike.