Korsh Catless Down pipe suit Subaru WRX STI 01-07Maximum performance catless downpipe engineered specifically for Subaru WRX STI models from 2001 to 2007. This high performance exhaust component delivers unrestricted exhaust flow for track and competition use. Key Features: Direct bolt on fitment for 01 07 WRX STI Cast Head for improved flow Unrestricted design for maximum exhaust flow Precision engineered mandrel bends for optimal exhaust flow Durable construction for long term performance Maximum