AVOTurboworld's Gen 3 center pipe kit for the Impreza 2.5i 2008-2011 Sedan offers improved flow and a deep, smooth sound. The center pipe section includes a resonator and is 2.5" stainless steel all the way through to the y-pipe which is twin 2.5" to the rear muffler joins. It will fit up to the rear factory OEM mufflers. The AVO centre pipe kit 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.