stock exuast they run about 6.5 psi stock.. new exuast and downpipe and they will run ~8 psi..
10-11 psi is all you wanna really run on stock i/c and plastic pipes... stock turbo is good for about 12-14 psi.. then its time for an upgrade.

stock they have been known to run low 15's to high 14's.. though a few people have managed nice mid and low 1/4 mile times stock..

they are hard cars to get good launches.