common question, bear with me on this one, i was wondering the max boost if i got a manual boost controller i could run on at 90 supra turbo? i would do the research myself but simply dont have the time and i thought this would be an easy question u guys could answer. thanks for the help

if your car is absolutly stock 8 psi would be the best cause you dont wanna blow the engine but if you upgrade your whole exhaust you could pull a good 12-13 psi safley

Upgrading your exhaust will not make it any safer to run higher boost levels, anything other than the HG will not make it any safer.