Invidia 15+ Subaru WRX/STI 4Dr Q300 Twin Outlet Rolled Titanium Burnt Quad Tip Cat-Back Exhaust (HS1 (HS15STIG3T) 4011 Professional installation is recommended to

Professional installation is recommended to ensure proper fit and finishing

delivering a 44% increase in fuel pressure over the factory fuel pump (115 PSI max pressure AEM vs 80 PSI max pressure stock)

resulting in exhausts gasses exiting in an inefficient manner

5L V6 offers a free-flowing 3-1/2 inch mandrel-bent aluminum tube induction system designed to increase horsepower

Invidia 15+ Subaru WRX/STI 4Dr Q300 Twin Outlet Rolled Titanium Burnt Quad Tip Cat-Back Exhaust (HS1 (HS15STIG3T) 4011 Professional installation is recommended toThe 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. This Invidia product is an excellent way to experience the improvement of the performance of your vehicle. Designed with utmost care