Well im still thinking about the 675's. So this is what your running on now? Im just worried about lag. What do you think i should do? I think its between the 600r and the 675r's at this point. I have never drove in a z with larger turbos so im not sure what it feels like you know. I mean i dont wanna have to down shift to have the turbos kick in on the street when I wanna play around. Its like when i built a pond tho. I was mad a year later cause it was 2 small for my likings. They always say go a little bigger than you think you want. Ill just keep a eye on what people have to say and compare dyno charts the best I can. Hopefully i figure out what i wanna do. Thanks for all your suggestion and comments guyz! MIKE