Buckhead Imports RMS Stage 2 supercharged E39 M5 (S62 V8) cracks 600 wheel horsepower on 91 octane
This is the same E39 M5 that previously ran 11.7@122
in the 1/4 mile. They took it to a dynojet and it put down 606 wheel horsepower in what appears to be STD correction. Impressive? Yes, when taken into account this was supposedly done on 91 octane pump gas. Blower used is a Vortech V2 SI pushing around 10 psi of boost. This would be the first and only S62 in the world to go over 600 wheel on stock internals. This level of boost on pump gas with 11.0:1 stock S62 compression shows a well tuned setup by RMS.