Hrmm yeah i went to subaru... to ask the engineer they reakon it can handle maximum 1.2 bar.. but im thinking ive got to upgrade that bonnet scoop for abit more cooling, Quite alot of people jack their boost with stock end motors and ive never heard anybody had alot of problems. im not quite sure. ive got a mate hes running 1.4 bar on stock end (not the smartest thing to do at that amount....) he said it was alright as long as you dont give it to much shit. But yeah i think jacking up the boost you would need to do other upgrades, ill do a search but yeah alot of mixed opinions, thought i'd come here and ask alittle