STAINTUNE exhausts feature a polish that is unmatched in the industry. They really do have to be seen to be appreciated. Their pipes also feature a removable sound restrictor in almost every muffler they produce (when the design allows). This restrictor allows you to adjust the sound levels to your liking. The photo below shows what the restrictor looks like in the muffler and also what the restrictor looks like when removed. You can see the little set screw on the underside. Visit Staintune's website (link above) for more info and pictures of their systems.

** Removable sound core