There is a show on SpeedTV called Hi-Rev Tuners, it's usually pretty crappy (lots of RICE!!!). Today they had a Mazda6 and they were installing a 50 shot of NOS. Basline run on a Mustang dyno showed about 150hp at the wheels (this was the V6 obviously) and after it was up to about 205 hp at the wheels. I just caught the end of the show, so I don't know if they have other mods or if that is it. Just thought I would share.