Ive just been out in a moded Cup. The guy is on the sales team at Bristol street at MK. Hes a very knowledgable bloke when it comes to Renaults (not your usual salesman b*llsh*t) and has his own Cup (not a company car). Anyway his had some serious mods, Renault sport ECU, hand built stainless steel exhaust (a one off cost £800), and a racing airfilter.
The result......
........well lets just say its pretty close to my v6 if not as good performance wise, and the sound, F*CKING AWSOME!!!!
If anyones interested ill try and get some more details, i asume these parts fit normal 172 as well.
Oh, and if anyones interested in buying a new Renault (from a renault dealer) his the man, excellent deals (got £2500 off my wifes new Scenic).