So which one do you have, an NA or TT? Do you have a 2+0 or 2+2(has back seats)?
The exhaust is completely different on a 2+0 and 2+2 and do not interchange without modifications. The test pipes have a different bend connecting to the manifold on a TT compared to a NA. So from right there if will not fit.
Our cars come factory with cold air intake. What most guys do is add a POP charger and take out the restrictive air box. Its very easy to do and should be fairly cheap. Decent ones run anywhere from $60-$300.
http://www.ebay.com/itm/Air-Intake-Syst ... 3c&vxp=mtr
I run one very similar to this, I have no complaints.
http://www.ebay.com/itm/Aluminum-MAF-Ai ... 63&vxp=mtr