Have a browse in the technical section, pretty much everything you'd ever want to ask is in there lol http://www.ukstarletclub.com/forums/index.php?showforum=11 But the best way for more power is to get the engine breating nicely; Inlet manifold from a 1.3Bug-eye Corolla (98-00), K&N Panel filter or induction kit with cold air feed and alloy inlet pipe, 2" Cat-Back exhaust system With those mods I went from factory power (75bhp) to 87.6bhp Oh and watch where you're posting things, you'll get to know the forum soon enough!