OK so my buddy's car is stock turbo.(its not a celica)
He left it stock until a lil while ago he put on intake, a new FMIC, a new BOV and the cut the exhaust maybe 12 inchesaway from the turbohis
his PSI went from 6 to 10, but it wants to go higger, but everytime the PSI redlines (the stock guage goes up to 10) he gets a fuel cut. can anyone help even though its not a celica?

FCD!

??????

oh sorry haha. just get a FCD (fuel cut defencer) and idk if your friend has a boost controller since you didn't list it, but get one of those too. then get some bigger better injectors and fuel pump and hurray more power w00t! what kind of car is it btw?