I have finally started to tweak my astra sri 1.8 16v on a 51 plate. I've already started with the basics, magnex cat back stainless steal system and a K&N 57i induction kit. Next i was thinking of magnecor ht leads and a fse boost valve. I don't want to start spending silly money, otherwise i might as well look out for a gsi!!!!
any thoughts on what to do next?