Does anyone know if I swap out my Headers and get high flow cats, will I gain/lose power and will i get a deeper sound or high pitched sound? I was plannig on getting STRUP headers and Stillen super high-flow cats.

 

Welcome to the forum.

Some members are looking for performance, others are searching for the ever-elusive exotic exhaust sound. The forum is a wealth of suggestions and opinions. Read and learn. I suggest that you begin here:

https://my350z.com/forum/engine-and-drivetrain/50429-new-350z-owners-read-this-before-doing-any-modifications-to-your-z.html