I got one off ebay for my Rsi . Definitely recommend. It does mess the power band up, no power low down but plenty when the revs are up. Made it much more driveable and even improved mpg! However dont forget to put the Cat back on for your MOT!
Where are you?? london area try viper or Xtreme something or other.... Any custom exhaust place will do it. As long as u don't have 2 lamda sensors cos then car won't work.. See someone in an exhaust place mate