Miss that original Tokyo Roki filters Subaru use to supply here in the USA? Have no Fear, Mazda to the rescue. Yes you heard correct, Mazda ROKI oil filters are the same as the original oil filter that came in your WRX and STI back in the early 2000s. Just slightly larger. Why do you want it you ask? The blue filters Subaru uses here in the states aren't as good of quality as the original black Tokyo Roki filters. The extra oil capacity and filtration also helps a lot.
Style - Spin-On Canister
Thread Size - M20x1.5
Filter Media - Enhanced Cellulose
Micron Rating - 21 Micron
Gasket or Seal Included - Yes
Bypass Valve - Yes
Bypass Valve PSI - 20.3-26.1 (Meets Subaru Turbo Car Requirements which is 23 PSI)
- A crush washer is recommended for every time the oil change is performed, unless you have a Fumoto Drain Valve. See SKU# 11126AA000 https://www.smyperformance.com/subaru-oem-oil-filter-crush-washer-11126aa000.html
The description here covers just what I was going to say about the filter. Fits just like the stock filter. So much better. Whatever you can do to protect the engine.