I've superchiped my 2.0 406 Coupe . Its was measured at 137BHP before and now is 150BHP , so thats a fair improvement, I've started to use Optimax . (These two improvements have certainly helped the performance) and I've got a Scorpian Imola4 back box on order.
The next step is the air filter. What is the best filter system for the 406 Coupe.
Thanks . Tony