I disagree not running a bob will kill your turbo. I've spoken to a lot of big name shops in Melbourne that have said it will not damage your turbo. Each to there own though I guess. Upgrade your injectors afm meter and but a hks 2530 or 2535. Or one of staos hypergear turbos. I have a hks 2535 spare with dump and oil water lines here spare for $1100 if your interested.