Hi, still trying to learn my way around this site. I bought my Z on May 7 and finally got it plated. Took it to a dyno tune shop in Omaha. I figured by the car's idle that it had a cam. Guy at tune shop said definitely. So we put in new plugs, wires and leaned the A/F out a little. We did three pulls for a best of 404.9 rwhp at 6880 rpm. My car is a 2003 quicksilver Z06 w/70k miles with cam, cold air intake, and long tube headers. After the tune the car pulls real hard past 5000. I am very excited about this car.