I love my Grimmspeed BCS, probably didnt take full advantage of it but the quick tune I did for my current setup (td04, tbe, pnp headers) I got a faster spool and held boost a bit longer. Probably could have done more with it but I have a new setup coming up this weekend (Vf39/Sti Tmic)... I think Josh at import image sells them for about 90 shipped... its a super easy install (plug and play) but I wouldnt install it until you are at your place where you are going to tune (it will only take 20 mins to do tops)