If you don't want it loud don't buy duals, or any exhaust. If you want it to sound bad ass and gain some hp get the barkers.I had one on my S......it was so loud without the quiet cores that I didnt even run it more than 20 seconds without them! Even after installing them, they were so loud at WOT that I removed them and sold them after one ride. Nice quality exhaust, just too loud for me.