I have just found out today as i was planning on fitting a full stainless zorst to my Mk2 clio. I though I would give the local police a call to find out what the db limit is for a system. Only to be told that anything louder than standard is illegal. Aarrgh been wantin a full system for ages. After finally raising the cash to purchase one its not worth risking a fine over. Does anyone know of any performance systems that are not louder than standard. The expected answer is no.