Toks238

Hi guys, first post on here. I got a R34 just before Christmas and think its time for some upgrades. The only upgrade (that i know of) is a full exhaust system and that's it engine wise. I want to turbo it eventually but cant until September because of P plate laws. I also don't know much about turbos. Can anyone help me with some engine upgrades to help beef it up a bit? Cheers.