Invidia 08-11 STi Hatch / 11 WRX Hatch Dual Q300 Titanium Tip Cat-back ExhaustDescription: Q300 Exhaust Piping: 76mm Tip: Dual 110mm Tip Style: Rolled Ti x2 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 SUS304