really a very good product for our Z's. But, Haken I still think you should get an ECU upgrade just to be on the safe side. I agree and am impressed with what you've done with it but be safe about it. Your EGT will probably be cool and emissions will be great but your A/F mixes along with some other items aren't ideal if your still running your 15psi. Even though that is impressive boost pressure, be safe about it. BTW, Congrats on everything so far and good luck with other possibilities.