As Tony said, Ive got a Blouch snail going on mine soon-ish.

A.Dave is on the money. Go the TD05-18G (with an 8cm housing) will be a nice upgrade over the TD04 (or so I am praying to god it will be for myself too haha).

Only one change to the support mods is I am sticking with my cut OEM resonator (chopped off the bottom and sealed it up), OEM airbox and STI high flow filter as opposed to an intake to retain response and low-down torque.

My excuse for a potential blown EJ255 (as Tony knows) = EJ207 + 6spd swap. Done.

Good Luck