Ah yes sorry I just found this post
They were fantastic. Very good workmanship and they made the exhaust exactly to how I wanted it. ( I didnt even think it was possible ) I really did not want a rear box like the Magnex oval and it had to be way off the ground for my liking, without cutting it into the bumper.
I asked for "Not too loud" and thats what I got. 4 months later I thought it was getting louder so they did their magic "FREE" I believe I was their first "Real" Clio 172 customer. They started to produce off the shelf systems for the 172 after a while. Off course personal one offs would always be a few bob more.
I still see my old 172 regularly ( Gainsborough Carpets London Rd Chalkwell )
The H&S box is still on it
http://www.cliosport.net/gallery/clio172/dash2.jpg