Mishimoto MMHOSE-SUB-08IHRKST Rockstar Subaru WRX Silicone Induction Hose, 2008&ndash;2014, Black Direct fit for the 20082014 WRX and 20052009 Legacy GT/Outback XT INNER DIAMETER: 2.38" turbo side 2.75" intake side OUTER DIAMETER: 2.63"-3.25" CNC-machined aluminum fittings for added durability and easier installation Mishimoto Lifetime Warranty