John DennyJohn Denny has been heavily involved with the BMW Owners Club UK for many years and has written numerous articles on M Power cars, as well as providing content for motoring websites, such as Pistonheads. Though in his day job the author works in IT, is passion is restoring modern sports cars, and over the last twenty years has owned and sympathetically restored over twenty M Power cars. An E46 M3 still has pride of place on his driveway. Read More Read Less