Invidia Q300 Cat Back Exhaust Volkswagen GTI (Mk7) 2015+Invidia has established their name in the aftermarket performance industry with their state of the art exhaust systems that improve performance for a variety of models. Now available is the Q300 Cat Back Exhaust System for the Euro market. This design features dual exit flat bottom mufflers built for high speed aerodynamics. And the continuous piping design improves throttle response, and low end torque. The fabrication of this exhaust is crafted from