I'm new to this thread and wanted to get some opinions on aftermarket exhaust for a 2012GT500 and a tune.

I had a 2009 GT500 and installed Borla S-types (with x-pipe). The sound was great, but the drone was unbelievably loud at about 68-72mph. Has me nervous about installing Borla again...more because of the price.

I like the sound of the new exhaust on the 2012, but want something a little louder. I'm sure this video of the SLP Loudmouth has gotten lots of hits:


I called SLP, and they said the drone is there but it can be lessened with Dynamat in the trunk. Anyone have experience with SLP Loudmouth on a 2012 Shelby? too loud?

Anyone have any experience with Borla Atak on 2012 GT500? I was only going to get axleback this time. is it worth the $780+?

Thanks in advance.