AVOTurboworld's Gen 3 high-quality stainless steel Cat Back Exhaust System comes with quad-tip dual mufflers for the 2010-2014 STI Sedan. It is a great upgrade for somebody looking for a top-notch piece that is louder than stock but not so loud as to be annoying. Our high flow system features a resonator in the mid pipe for getting rid of the drone and as a whole gives a great note that accentuates the boxer rumble. The Quad Tapered Exhaust tips are adjustable so they can shifted into any position you like. The AVO cat back has a tapered flange at the front so that it can fit a standard OEM front pipe with a donut gasket setup. This will ensure the flex in the system still operates as it was intended to from factory. The Y-Pipe has an adjustable coupling with a clamp to allow for ease of fitment.