Thanks for the replys the last few days.
i now have the 03 zo6 stock. 14k.
i would like to get 500 hp from it instead of 405. or there abouts.
whats the simplest way other than nos.
lt headers are illegal in nc.
is a supercharger pretty much the easiest? can you use that alone? no other mods.
or should i do short headers. cat back system, cai, and a downloader?
i am not looking for the fastest just set it apart and feel more like a big block.
any advice is appreciated.
phil

It's late, but just a few things: who told you LT headers are illegal in NC? I have them on both my cars (and they came stock on the Porsche). I know dozens of people with them on their cars. They all pass inspection every year.

A SCr is the easiest way - Magnusen kit is the best overall, but you need a new hood for that, Procharger doesn't produce the low end torque but works well and gives you the power.

More later.