As Parksey so reliably informs you the ECU upgrades really were teeny weeny little niggles that took less than 10 minutes to rectify (if you could be at all bothered to do so). People have indeed been modifying their cars with induction kits, exhausts, panel filters, lowering and even a strut brace. I'm not so much into all that (esp as the biggest mod I made was having my calipers painted gold *lol) but from what I can gleam, power gains are there to be had from an already bl**dy nippy car and more mods are in the pipeline (so to speak *heh*)