Well it looks like you have an 03 so if you have the time and funds you may want to have the trans brought up to current Mitsu spec and have all the TSB's done. Also, I would go with the Quaiffe, I have seen many of them perform flawlessly on the street and track with no negative consequences. Plus if you do ever have any issues, they carry a lifetime warranty. Good luck
Alfred at TTech
Alfred at TTech