here is a good thread on how well the TD06H/20g works on the sti .
NASIOC - 415hp 444tq (05 STi)

check post number 8. guy made 419whp on 93 octane and went 11.4 at 117 to back it up. hit 459whp on c16.

STIs are HEAVY!

I will be happy with that dyno graph posted. that will push my car to 11.3-11.4 with a good launch

lancerman