The experimental 10-cylinder was developed for a sport sedan, and it was believed to have been destroyed.

The legendary BMW E39 M5 just got an upgrade — and it sounds absolutely insane! In this video, we install the Evolve Billet Plenum on a supercharged E39 M5, unlocking more airflow, a deeper induction ...

The team at DriveTribe uncovered and drove a perfect example of this daring absurdity in a YouTube video about an E39 BMW M5 ...