Turbo XS High Flow Catalytic Converter Pipe - Subaru WRX / STi 2008-2014The WS08 CP V2 is a 3 inch High Flow Catalytic Converter designed specifically for your 2008 2014 Subaru WRX and STi. It has a 100cpi metal substate catalytic converter. Please note that this part is NOT a stock replacement pipe. This part requires that you already have the front half of a TurboXS downpipe (part number WS DP V2) to make a complete downpipe that will mate from the turbocharger outlet to a catback exhaust.