AVOTurboworld's Gen 3 high-quality stainless steel Cat Back Exhaust System comes with a round tapered quad-tip large rear muffler for the 2008-2010 STI Hatch. 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. Designed specifically to have a minimum of bends while maintaining a bolt-on fit, allowing for maximum flow and a great note that accentuates the boxer rumble. Comes with a resonated intermediate pipe, s-pipe to the quad tip rear muffler and a full complement of gaskets, nuts and bolts to complete the job. The AVO cat back has a tapered flange at the front so that it can fit a standard OEM front pipe or AVO front pipe with a donut gasket setup. This will ensure the flex in the system still operates as it was intended to from factory.