This GrimmSpeed Donut Gasket is a top - notch replacement for your worn - out or missing OEM donut gasket. It's a must - have for Subaru WRX (2002 - 2022), STI (2004 - 2021), 2005 - 2009 Legacy GT, 2004 - 2022 Forester, and 2005 - 2022 Outback. While many aftermarket exhausts use flat gaskets, Cobb Tuning and Borla systems need this stock 'donut' style. It also works with a 3 - inch flat flange downpipe adapter. Made of fiber - reinforced graphite, it's sold individually and replaces Subaru part number 44022AA123.
Using this GrimmSpeed Donut Gasket is easy. First, make sure your car's engine is cool. Then, locate the lower downpipe and midpipe on your Subaru's stock exhaust system. Remove the old or damaged OEM donut gasket and replace it with this new one. When installing, ensure it fits snugly between the pipes. Note that if you have a Cobb Tuning or Borla exhaust system, this gasket is essential. Also, it's required when using a 3 - inch flat flange downpipe adapter. For maintenance, there's no need for special treatment. Just check it regularly for any signs of wear and tear, and replace it if it looks damaged or worn out. This way, you can keep your exhaust system working smoothly.
