Last year I was going to try tuning my 2.5i 6MT. I bought a used tractrix cable cable, downloaded my stock program and asked for it to be defined on Romraider. I worked on tuning other cars, so I am not completely new to this but I started researching and realized to fully understand the logic of Subaru ECM it was going to take a bunch of time. I decided to put it off off a while. While I was researching NA tunes, I found some who did NA tunes for 4th gen Lgacy's.
Someone else also tried to do a GP on this forum this as well
After reading the 3.6R tuning thread it got me motivated to look into tuning again. So I decided to take a leap of faith and try it out, it is $150 and you need a tactrix cable. We did 4 revision and 4 datalog sessions.
I am very happy with the results. My car is 100% stock and I just use high octane gas. Most of the tuning was done on hot days this month and my car felt like it was winter. It been 60-70's the last couple days and I can really feel the difference (my car has never felt like this even on he coldest days) The power is especially noticable 3000 + rpm. I would recommend this tune to anyone look for more power.
I brought my car to the track last fall. At some point and time I will bring it back the track to measure the difference.
As a side note, using seat of the pants and looking at my logs its pretty obvious the power starts to drop off after 6000 rpm despite the 6400rpm tach. Initially, I was going to raise the rev limiter to 6500, but its pointless.