Killer B Motorsport 321 Stainless Holy Header with DIY Up-Pipe – Subaru STi, WRX, Forester XT, Outback XT, Legacy GT

This equal length header is made from thick-walled 321 stainless steel, which is alloyed with titanium for strength at high exhaust temperatures. The collector is a thick-walled cast 347 stainless merge, and the primaries are short, symmetrical, and mandrel bent.

This version comes with a DIY up-pipe and is not for inexperienced installers. Each header is inspected, assembled, and pressure tested before it ships. It is designed for an OEM-location turbo and works with OEM EJ25 oil pans and the Killer B Motorsport oil pan. It is made in the USA.

Fitment: 2004-2021 STi, 2002-2014 WRX, 2004-2013 Forester XT, 2004-2009 Outback XT, 2004-2009 Legacy GT. Forester, Outback, and Legacy models need to verify oil cooler clearances.