I got the idea of swapping in the U.K. E81 interior componentry from commenter The_Arch_Duke, who opened my eyes to the prevalence of manual M Sport seats in the U.K. With shipping, I spent $414 ...

Because of its overall condition, the 1991 BMW E34 M5 is currently sitting on Bring a Trailer for just $6,000 USD with three days left to go. Take a closer look at the car above.

This wasn't the only oddball E34 BMW's skunkworks built; it also installed the 6.1-liter V-12 from a McLaren F1 in an E34 M5 wagon. In comparison, the V-12 Z3 M Roadster seems almost conventional.

BMW E34 M5 Touring Is An Epic Family Car From The 1990s And It’s For Sale In The USA. ... Inside, new leather upholstery was fitted over the front and rear seats in 2008.

If you're willing to look past the lack of an "M" badge on the rear decklid, Bring a Trailer's 1995 BMW E34 540i might just be the perfect four-door Q-ship. See All 5 Photos.