not at current, but it is the next item for my car, i have heard good things about them, ie they are aluminised mild steel pipes and back boxes are stainless steel = no rust and a two year warranty, none of your cheap ebay crap that's just mild steel either painted or polished metal which in about a year or two rust to just create more problems. and have been reported to give power gains, nothing huge, but as they say, every little helps, and they work nicely with induction kits too, gives a better air flow with less back pressure on the system.
Also the complete systems just fit nice and easily as they are designed specifically for your car another bonus plus they are tested to be within the so called 'safe' sound limits the police like