Fitment: 2002 - 2014 Subaru WRX, 2004 - 2021 Subaru STI, 2005 - 2012 Subaru Legacy GT, 2004 - 2013 Subaru Forester XT. This GrimmSpeed gasket set ensures efficient and reliable performance when replaced during maintenance. Unlike many aftermarket and OEM gaskets, these are made of premium multi - layer steel with 304 stainless steel fire - rings. They're 2x thicker than OEM (12 layers) and sold as a pair. Cross - references with Subaru part number 44022AA160.

Using these gaskets is easy. First, make sure your vehicle's engine is cool. Locate the header collectors to crossover location where the old gaskets are. Carefully remove the old gaskets and clean the surfaces thoroughly. Then, place the new GrimmSpeed gaskets in position. Make sure they fit snugly. As for maintenance, check the gaskets regularly for any signs of wear or leaks. If you notice any issues, replace them right away. Also, keep in mind that these gaskets are made of high - quality materials, but extreme conditions can affect their lifespan. So, if you drive in very harsh environments, check them more often.