I went from a steeda catback with a bassani Catted X to a custom Borla XR-1 catback. It is much louder with fewer popping backfires, suprising because I thought it would be the opposite. No sound clips because I am not that technologically advanced. Just a note I love how easy it is to change the exhaust on thesen things. Took me 15 minutes to take the old one off and install the new one.