I just got a 2006 3, and i was curious if there was a turbo they make for it...or if i could even just put an aftermarket SPEED 3 turbo in there....it already has a cold air intake, performance exhaust, and acarbon fiber hood. its fast...but i wanna make it faster.

check out Hiboost.com or f2usa.com

Also bear in mind that it's not as simple as bolting a turbo on to the engine and being done with it. There are many more components, and a lot of work that go into installing everything, not to mention tuning it. Plus if you're going for big power (vs. a little boost all the time) you'll need to build the engine with forged components.