If you like turbo whistles/noises & want more throttle response then a “CAI” would be a good start too. I personally removed the OEM intake system along with all the plumbing behind the passenger wheel fender and added a spectre intake (cheaper version of the K&N intake… since K&N owns spectre lol)… however I did modify it a bit more to my liking. Also if you haven’t found out already, this little turbo car loves higher octane gases (91/93 octane, etc) not only does it help A LOT with throttle response but it literally makes more power on a higher octane table, look around the forum, a few of the guys have posted about it in the past with proof and results.