This. ^^^You may not get much response they like for you to do your own research on the site. The 1.8 is super tuneable so you should have no problem finding info. Honestly I'm suprised you didn't get alot of sarcasm lol. DO the research one you decide on your list i.e. CA, CHIP, exhaust etc. then pick their brains about specifics i.e. manufacturer. You may get further!! Good luck!!
N.
Spoken like a true W8 owner.You have 12k to invest in a 10 year old car? Dont get me wrong, I love my Passat too but I wouldnt invest that much. Other than simple things like window tints and a few exterior upgrades, that's all I am putting in. Good luck.