I live in Largo, Florida and have a 2001 Z06. Mod's I have made to-date include a Halltech intake, 160 thermostat and Borla XR1 Race Exhaust. Best dyno (before the thermostat) was 346.7 RWHP. It was a hot day (95 degrees) with close to 100% humidity, so I think my next dyno run will be significantly better. I have not done any programming yet. Does anyone know of a reputable tuner in the Tampa Bay area? I just learned of Tune Tech in Tarpon Springs. Any others? Also, are headers going to help significantly if the Cat's are left on? Any other mod's that are recommended? Please respond to this post or you can reach me at [email protected]. Thanks!