The TurboXS catless downpipe features a cast steel bellmouth design with stainless steel piping which tapers from 4in at the mouth to 3in piping. The TurboXS 02-07 WRX & STI downpipe is designed to fit perfectly with the TurboXS external wastegated uppipe. If you have an older version of the Turbo XS Stealthback or Turboback and want to run the TXS EWG setup you need to update your downpipe to this version, you do not need the Catback Adapter.

The TurboXS Catback Adapter is required if you want to connect the TurboXS Downpipe to an aftermarket catback exhaust that is designed to connect to a stock, or stock location downpipe.

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