What size will the primaries (secondaries?) and collector be? Will it be resonant wave tuned for the EJ253? If not, is it going to be UEL? Lots of info one would want/need to know before saying if they were interested or not. and 2.5i's are 06+... but you should verify that the collector location and flange orientation is common between all years 2.5i's to avoid confusion.