Hey so christmas is coming up and i wanted to put it all back into my car. Nothing that will void my warranty but something that will be a fun project to install and something that ill enjoy having in my car. Thinking about a carbonio cai but im not really sure yet. Nothing more than about 350$.. any ideas?

 

I'm assuming by not voiding your warranty, you mean no significant modifications... which pretty much leaves cosmetic stuff. You could get a spoilers, or S4 door blades, or stuff like that.

 

APR or REVO makes a chip that can be put into an undetectable mode for dealer trips. Revo would be cheaper but more like $500 unless on sale. About 50 hp and that is no joke. An intake is not worth the gains and some people have gotton more problems than good with them. You really don't have much options other than that for performance. You could do a custom muffler shop exhaust but again, the gains are next to nil.

Maybe add a boost gauge? That will give you a base line for max boost and be able to help you detect boost leaks by showing lower numbers in the future. If you've read, PCV and Diverter Valve failures are common.