Fitment: 2006 - 2014 Subaru WRX, 2004 - 2021 Subaru STI, 2005 - 2009 Subaru Legacy GT. This is a direct - replacement IAG V3 AOS 20 - inch coolant line, included with Street & Competition Series air oil separators (PN #IAG - ENG - 7180, IAG - ENG - 7181, IAG - ENG - 7280, IAG - ENG - 7281). The 1/2 - inch heater hose, 20 inches long, has a pre - assembled banjo - style coolant fitting with Viton O - rings.
Using this IAG coolant line is easy. First, make sure your vehicle's engine is cool. Locate the old coolant line and carefully remove it. Then, take this new 20 - inch coolant line and connect it to the appropriate places, using the pre - assembled banjo - style fitting. Ensure a tight connection. When it comes to maintenance, check the Viton O - rings regularly for signs of wear or damage. If you notice any leaks, replace the O - rings right away. Also, keep the coolant line clean from dirt and debris. Remember to use the correct coolant recommended for your Subaru model.
