I called a local shop for some Spintechs because obviously I wanted Spintechs but he offered me Aero turbine mufflers. Anyone here got some on hand experience with Aero mufflers or even compared the two when it comes to sound and performance gains? My first choice was SLP mufflers cause the price is very nice and the sound is very close to the spintechs please anyone correct me if I am wrong. Honestly I thought I had it narrowed down between the two and now the guy at the shop confuses the **** out of me by offering me these Aero turbines.