The current M5 is powerful ... failure that BMW won't cover due to the modifications, Noelle will fix it within the duration of the original factory warranty. For non-modified parts, the company ...

BMW hasn’t made an M5 Touring since the V10-engined E61. Not enough demand, it says. German tuner Carbonfiber Dynamics thinks this is utter tosh (and we agree), so it’s made its own.

To celebrate 30 years of its M5 supersedan, BMW’s M GmbH performance division ... The power boost comes thanks to modified engine management and forcing the turbochargers to breathe harder.