I have a 99 GTS with high flow cats and a Corsa cat back exhaust with stock headers. Otherwise, the rest of the car is stock.

I'm thinking about putting on aftermarket headers, not for performance gains or for any reason in particular, but just to give me something to do.

A couple of questions:

1. Does the exhaust note/volume change significantly by adding headers to a HF cat + Corsa cat back?

2. What kind of headers would you guys recommend?

3. Is adding headers even worthwhile? (I think the car sounds great as is, but I wouldn't mind it louder)

Appreciate the advice.
Bill