This 2" diameter Borla(r) Axle-Back system developed for Subaru's sixth generation Outback has been specifically engineered for the 2.5L 4-cylinder engine. The S-Type sound level provides a more aggressive sound over stock and accentuates the Subaru Boxer engine rumble. Borla(r) ensures a comfortable driving experience and guarantees a drone-free exhaust system. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Our Axle-Back bolts on to the factory flange for ease of installation and features a 3.5" x 2.75" oval polished T-304 stainless steel exhaust tip. Whether you are driving through the city or taking the road less traveled, choose Borla(r) for your adventures.