The Subaru WRX and STI sound amazing with a Catback Exhaust, so why not go with the best Catback you can get for it? The Invidia Titanium Catback Exhaust will not only give you the sound you crave, but you will also see real performance gains from its high flow design and feather weight titanium material. Increased power, an amazing sound and a reduction in weight will leave you smiling ear to ear knowing you installed one of the best exhaust systems on the market. This is a proper racing exhaust for those looking for the ultimate in performance, nothing else comes close.