That DP is the best one for a Mitsu.
Ask me how I know.
You will need to mess with the actuator abit to get the boost down to 15.
You will need to buy a 3" cat for it, as it had no provisions for a cat.
I had problems getting more than 17 psi in third gear with this pipe. The wastegate hole flows well when you take out the service puck.
If I get approved for my loan next week, I will outbid you on this one.