Fitment Information Subaru WRX & WRX STi (2002, 2003, 2004, 2005, 2006, 2007) Emissions Compliance This exhaust does not alter, replace, or modify any emissions equipment. Specs & Features Full titanium construction for optimal weight reduction 80mm piping diameter for improved exhaust flow 115mm tip diameter for an aggressive look Exceptionally lightweight compared to OEM and competitive aftermarket systems Enhances horsepower and torque output Minimizes turbo lag for faster throttle response Generates a race-inspired exhaust sound Aesthetically pleasing appearance that turns heads Comes with new gaskets and installation hardware for a hassle-free setup   Product Description Tomei Expreme Ti Titanium Catback Exhaust Subaru WRXSTi 2002-2007  Can't decide if you want to hang this on your living room wall or on your Subaru? We get it, and we certainly won't argue with your choice. This is Tomei's Expreme Ti Titanium Cat-Back Exhaust System. Featuring full titanium construction, this exhaust system is very lightweight, and it combines a larger piping diameter with smooth bends which also feature JDM-inspired pie cuts. The result is more horsepower and torque, a good amount in weight savings, all while producing a race-inspired exhaust note. A great investment for your daily driver, weekend show car, or purpose-built race car as it is an exclusive part that will add style, value, and performance.