Audi TTRS / RS3 Valved Exhaust MK3Welcome to 5 cylinder fury. Both the TTRS and RS3 are extremely potent out of the box but lack some character when it comes to the extremely restrictive catback section of the exhaust. We fix that. Increasing the diameter of the system to 3 inches allows for significantly more flow through the system and towards the rear is where the magic happens. The rear section y section is where the magic happens. When operating in the valves open mode the
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