Well Ive just returned my Cup back to standard spec before dumping it back at the dealer (see separate thread in Clio Discussions).
I can hear wind noise again, and the induction noise is more obvious. The car still feels quick, but doesnt seem as meaty when you put your foot down. It feels a little asthmatic, which I guess it is. The dash rattles a lot less now, so the frequency of the exhaust note obviously contributes a lot.
When I get my new car, Ill be putting the filter/exhaust on asap and getting an R-Sport ECU. Anyone out there running a standard Cup should seriously consider getting a filter/exhaust. The car feels much more aggressive with them fitted.
