I have 3" DP with 3"Full exhaust and K&N filter in my 04 Sti, and when i WOT at high gear, my boost when up to 1.5bar. i was wonder is this happen to anyone else with the same mods i got? the car pull really hard with out pining. but i still dont trust those 91 oct. gas... =/

 

Thats called boost creep...theres a sticky on here somewhere about that...simple solution would be to port ur wastegate...and even thats not gauranteed...

 

Boost creep will be harmful to your engine man!. Go port your wastegate or go search in imprezawrxsti.com. They have bunch stories about this.