Torque Solution Throttle Body Hose Coupler - Subaru WRX 2002-2007 / STi 2004-2021Applications: Subaru WRX 2008 2014, STI 2004 2021, Forester XT 2004 2008 Torque Solution Silicone Couplers are made from high quality silicone wound 5 layers and 5mm thick. Perfect for high boost applications to withstand swelling and bursting. This is a direct fit of the OEM Subaru coupler. It will work with the OEM or aftermarket TMIC's. Features: 5 Layer Silicone 5mm Wall Thickness Street and track torture tested Limited Lifetime Warranty Includes: