very hard to find parts for the standard lex engine thats why most guys go s/c route bolt on look like they should have been there 50bhp air filter zorst decat 210 plus easily but cant realy push on from there turbo only thing thAT slows you down is MONEY IMO
DEPENDS if you want loads of power or just small subtle increases hardening your suspension up will make the ride feel faster espesially on the bends
has for insurance adrian flux has sorted a lot out on here