Welcome to Bowker Blackburn's Genuine BMW and MINI E-Bay Store. We are part a of the Bowker Motor Group based in Lancashire. If we don't list the part you require please get in touch on the contact details.Shown below and our experienced parts team. Will be able to help you find the part you require. Please add your registration in the notes box so we can confirm your order is correct for your car. BMW Genuine M Performance Rear Diffuser F30 F31 Black Matt 51192291418. For more information please contact. Bowker Blackburn BMW and MINI.