I'm looking for some performance upgrades for my 5-speed Audi A4. I've never really done much work on cars but now that i'm getting into it and have some good friends that are into cars i'm looking to do some stuff to mine. Currently my A4 already has a Borla double cat-back exhaust and a carbonio cold air intake. It also has after market brakes of some kind. Right now i'm looking mainly for HP increase. I've been looking at chipping it or maybe getting the APR ecu upgrade with a KO4 turbo. Any recommendations or personal experiences on upgrading this car would really help me out because like I said i'm kinda new to this. It would also be good if they were bolt on mods that I could do with my friend who is a mechanic and has a full auto shop setup so I can avoid having to pay for installation. Also i'm looking at trying to keep everything under $1500 for the first couple parts with maybe more to come later. Any ideas would be appreciated. Thanks