This is an unsolicited article that details the organized research conducted by an enthusiast to find an aftermarket exhaust that appealed to him.     

Which Aftermarket Exhaust Should I Select for my STI?

My quest to select an aftermarket catback exhaust system began when I took delivery of my Subaru Impreza WRX STI in March of 2005.  I realized that the STI was quiet and that the exhaust, which featured a stylish chrome tip stamped with the STI insignia, emitted no real performance sound.  Even when I stomped the gas and the turbo spooled up, the intoxicating boxer rumble barely penetrated the cockpit.

As I encountered STIs in my community with modified exhausts, I became envious of the sweet exhaust notes played by the 2.5L engines stuffed under their scooped hoods.  I could hear the sweet call of their exhausts even while stopped at intersections.  This was enough to make a man who was perfectly content man with his vehicle jealous.  I decided something had to be done about my STI's shortcomings and so I documented my research and decision making process.  The review and decision making process that I detail in this article is one that can be followed when making any exhaust purchase for any vehicle.