Rev9Power Rev9_FG-WRX/GR; RS Flange Type Blow Off Valve Adaptor for WRX STI Product Details Rs type blow off valve adaptor for subaru wrx / sti for top mount intercooler "application: - 2002 2003 2004 2005 2006 2007 wrx or sti - 2008 2009 2010 2011 2012 sti only "- will work with oem / factory top mount / after market top mount intercooler - adapter for direct bolt on , all rs type style flange - high quality aluminum - o ring design top & bottom to prevent bov leakage