02GT3897

I have a stock 02 gt auto with a magnaflow cat exuast(not magnapack) and it sounds pretty decent now, my question is if I add an x-pipe and bbk shory headers will it be much louder? It has a decently mean tone(low) now but I really don't want it a whole lot louder than it is, I am just looking for it to breath better. (plus the cerm headers look sweat!)