Invidia 15+ Subaru WRX/STI 4Dr Q300 Twin Outlet RolledDescription: Q300 Exhaust Piping: 3in Split to 60mm Tip: 110mm Tip Style: Rolled Ti The Invidia Q300 Exhaust features a flat bottom shaped muffler design results in improved high speed aerodynamic performance. The muffler inside contains continuous piping design and use of Advantex material that results in an excellent free flow exhaust with optimized back pressure, giving greater horsepower, torque gains and a rich deep sporty sound. The use of