I'm looking at getting the Aero Stealth 187 to do a muffler swap..it's a 3in/2.5 out (SI/DO) and i'm not sure the dimensions of my stock muffler...I have seen lots of users post about the magnaflow 12278 which is 3in/2.25 out and that it was direct fit...So I'm pretty sure I have 3inlet but not sure the outlet size? Or can the muffler shop make up the difference if my pipes are 2.25 ?

I have the '09 4x2 Lonestar w/stock duals (SIDO)

Also anyone else try any of these aero stealth line of mufflers ? I can't find sound clips for these anywhere :\

Thanks !