Since your putting in a new clutch get a lighter flywheel while your at it. Clutch masters has them for like 190 or so. Get teh cold air too
its worth it. Get a4-2-1 header and get a catback exhaust 2 1/4 inch piping. Greddy evo is my fav and it sounds awsome
Aem underdrive pulleys are cheap and pretty good you get better gains from those than a header.