I hv a 08 gp and after reading this over I decided to get a glasspack in place of the Res. Now my question is when you look inside of a cherry boom bullet muffler there's perforated cutouts on em. So if look at it one way all perforations are facing you and you can see the glass packed in. Looking at it from the other all you see is the back of the perforations. It claims to b mounted anyway there's no in or out like you'd see on most mufflers. Which way should I install it I do want the noise side lol. Thanks guys, and yes gpf is addicting thanks again