I would like my 2006 Mazda RX-8 Shinka to be a little louder. I just don't know where to start though. The engine has such a nice sound, but I can't really hear it. I don't want it to be so loud that it annoys the neighbors but a little more sound would be nice. It has the stock exhaust and intake right now. I don't think it's allowed to remove the cat here in Arizona. I also don't want anything that might make the car run hotter. I'm aware that answers will mostly be limited to exhaust and intake mods, but I just don't know where to start!
You can hear the sound of the car in the video I made... https://www.youtube.com/watch?v=JnzaAj5T_kI (go to 7:30 for the driving test)