I tried to make one, but did not come out good. I have switched to Dane's exhaust. I wanted it louder, and more performance. I also have a set of TORS for sale, but mine are ceramic powder coated satin black. I will see if I can post the sound so you might get an idea. The actuall decibels are only slightly higher than stock., but has a lot more rumble/bass sound. Plus it gets rid of the cats!