Coming from S550 platform, I'm still learning a ton about my new Cobra. Have Bassani mid lengths, catted Bassani X pipe and SLP mufflers. I'm want put cat delete pipes in and swap to a different muffler. Where can I buy just an axle back or better yet, just mufflers? I haven't run across anything other than full cat backs or mid pipes. Also, if I just swap entire catback, will it bolt up to Bassani mid length headers?