Part #: S0710. The Crawford Performance Single Chamber Air Oil Separator (V2) is specially designed for the 2015 - 2021 Subaru STI with a Rotated Turbo FMIC. Unlike a simple catch can, it's a closed - loop and maintenance - free solution. It helps your engine consume less oil, extends the engine's lifespan, reduces detonation and the risk of engine/ringland failure, and also cuts down on fuel dilution and subsequent power loss. Stop oil from pooling in your intake. The Crawford Air Oil Separator is the original fix for Subaru's well - known oiling system problems. Although similar tech exists in brands like Porsche, Crawford Performance invented the first system just for Subaru, and no other AOS on the market uses the same technology.

Using the Crawford Air Oil Separator is easy. First, make sure your engine is turned off and cooled down. Locate the appropriate installation spot in your 2015 - 2021 Subaru STI with Rotated Turbo FMIC as described in the installation manual. Install the separator carefully according to the provided instructions. As it's a closed - loop and maintenance - free system, you don't need to perform regular maintenance like you would with a catch can. However, it's a good idea to visually inspect it every few months for any signs of damage or leaks. If you notice any issues, contact the Crawford Performance support team. Keep in mind that this product is specifically designed for the mentioned Subaru models, so don't try to use it on other vehicles. Also, always follow the local environmental regulations when dealing with any oil - related products.