You can choose from several major labels such as Cusco, HKS, K&N, Subaru OEM, Mazda OEM, Killer B Motorsports among other major brands. If you are changing the oil in your Subaru WRX and want to keep the filter stock then stay with the Subaru OEM filter. If you want to get something a little more fancy then choose something like the HKS Hybrid Sports Oil Filter.
Either way, we are glad that you are keeping up with the maintenance of your vehicle. Make sure you stop by and check out our great selection of Engine Oils, and make sure you save your engine from harmful particles with a magnetic oil drain plug. Finally, while you're at it, make sure you top off your transmission with a proper transmission fluid.Read Less