thanks for replying to my post everyone....i know it's really in depth and all but when i talk to people they say you can run 4psi and not change any fuel managment or anything,,then i hear people say that you have too change it. i have the hole turbo kit..everything..hears what i can remember off the top of my head...header,blow off valve,wastegate,t3/t4 turbo(brand new),intercooler,piping,downpipe,gauges....i just wanna know if i put it on and all that if i have to tune it just with 4psi or is it alright to have runnin stock..Thanks everyone....you guys on here are really helpful and i appreciate it