Q300 Cat-Back Exhaust

The Invidia Q300 Cat-back Exhaust is engineered to enhance the performance and sound of your Subaru WRX (2002-2007) and STI (2004-2007). Its flat bottom muffler design contributes to improved high-speed aerodynamic performance, while the continuous piping with Advantex material ensures an excellent free-flow exhaust system. This optimized design manages back pressure effectively, leading to noticeable gains in horsepower and torque. Constructed from durable SUS304 polished stainless steel, the piping features precise mandrel bends for optimal flow. The system utilizes state-of-the-art CNC-machined flanges and Robot TIG welding for superior strength and longevity. It is finished with double-wall polished stainless steel or titanium tips, offering both outstanding durability and a refined appearance. The piping diameter is 76mm, and the tip diameter is 101mm. Users report a good, aggressive sound from the Q300 system, though one review mentioned that drone on long drives can be noticeable but tolerable.