Turbo XS Downpipe Catted Bellmouth WRX (2008-2014) STI (2008-2018) Nissan aFe flow-bench tests and dyno

aFe flow-bench tests and dyno tunes each intake system in-house with an emphasis on mid-range power

This HKS 3 inch catless downpipe with a cast bellmouth design for the 2002-2007 Subaru WRX and STI is constructed from polished SUS304 stainless steel piping and is mandrel bent for the smoothest flow

the results are shorter stopping distances

NOTE 1: Two spacers are included with each order

Turbo XS Downpipe Catted Bellmouth WRX (2008-2014) STI (2008-2018) Nissan aFe flow-bench tests and dynoTurboXS downpipe with high flow catalytic converter for the Subaru WRX and STI uses a massive cast 304 Stainless Steel Bellmouth that tapers to 3. 0" piping where it connects to the mid pipe. Features: Two piece design Delete the catalytic converter without having to buy a whole new downpipe (Catless Race Pipe WS08 RP V2 sold separately) Easier installation Cast 304 Stainless Steel Bellmouth upper section for maximum exhaust gas flow 3. 5 inch