But, 600AWHP is not ALL turbo. There is an engine on there too. For example, my 18T makes roughly 300WHP on my car @ 20 PSI. But if you put a turbo kit consisting of my 18T on a Ferrari Enzo, It would be over 600WHP even on 5 PSI. I recently boosted 22 PSI => 20 PSI from MBC by stretching spring + WG rod shortened 3 times. I bent a rod and 5 hydraulic lifters AS SOON as I did this. Not cool. BUT, my timing was also advanced and it could have helped bend them. Be safe guys. Instead of getting another 20 (twenty) WHP on your car, thus bending a rod and lifters, just lighten your car by 200 Pounds and get the same results. Recap: 20 PSI is fine, but 22 is the danger zone.