There are people on here who have run nearly 100k miles turbocharged. You won't last long running 7-12 psi for very long. The compression is way too high. The 5 psi would put you faster than a WRX anyway. If you want to keep the 2.5 liters of displacement, and running that kinda boost your 2 options are STi Shortblock, or new pistons and rods to lower the compression.