The addition of a performance uppipe is a favorite modification among die-hard Subaru tuners around the globe. Invidia's Subaru Legacy GT uppipe is a catless direct bolt on replacement for the factory uppipe in your 05-09 Legacy GT. Removing your Legacy GT's restrictive factory uppipe increases exhaust flow to the turbocharger and in return improves turbo spool, throttle response and power output. The Invidia uppipe has a bung for an EGT sensor, but can easily be plugged when used on the 07-09 Legacy GT, which do not have an EGT sensor in the uppipe (plug not included). The Invidia uppipe includes replacement studs for added installation convenience. Though the 07-09 Legacy GT do not have a cat in the factory uppipe like older models, this product will still improve throttle response and drivability.