Full House Astonishing, 560hp supercharged, custom metal wide-body, one-off E39 M5 will blow your mind. 560hp supercharged, custom metal wide-body E39 M5. With a custom metal wide-body, an incredible custom interior and a supercharger making 560hp, this astonishing E39 M5 is one of the most impressive builds we’ve seen in a long time. Words: Elizabeth de Latour. Photos: Patrick Lauder.