Fitment Information: This gasket fits 2002 - 2022 Subaru WRX, 2004 - 2021 Subaru STI, 2005 - 2009 Legacy GT, 2004 - 2022 Subaru Forester, and 2005 - 2022 Subaru Outback. Features: The GrimmSpeed Donut Gasket is a direct replacement for your old or missing OEM donut gasket. It's a 'donut' style exhaust gasket that goes between the lower downpipe and midpipe on the stock exhaust system of Subaru WRX or STI. Cobb Tuning and Borla exhaust systems need this stock 'donut' gasket. It's also required with a 3 - inch flat flange downpipe adapter. It has a fiber - reinforced graphite construction, is sold individually, and replaces Subaru part number 44022AA123.
Using this GrimmSpeed Donut Gasket is easy. First, make sure your vehicle is one of the models it fits, like the 2002 - 2022 Subaru WRX or 2004 - 2021 Subaru STI. Remove the old or missing OEM donut gasket from between the lower downpipe and midpipe on the stock exhaust system. Then, place this new gasket in the same spot. When installing, make sure it's properly aligned. Some aftermarket exhaust systems, like Cobb Tuning and Borla, need this gasket, so keep that in mind. Also, if you're using a downpipe adapter with a 3 - inch flat flange downpipe, this gasket is a must. As for maintenance, there's not much to do. Just check it periodically to make sure it's in good condition. If you notice any signs of wear or damage, replace it right away. Remember, this gasket is sold individually, and it replaces Subaru part number 44022AA123.
