I just bought a '02 wrx and was wondering what psi is the turbo running on a stock WRX?? And how much can I pump up the psi with the stok motor? Im thinking of upgrade the turbo to a Blouch TD05H-18G. Its a direct bolt-on kit.

 

13.4, i had a 18 that was pushing 18psi on my old wrx

 

I found a 520 20G, you think its still ok to run this turbo??

 

if u like lag then go with the 20g but the 18 was enough lag for me