Use this stainless-steel turbo oil return press in fitting to clean up your oil return line from a rotated turbo setup in your Subaru EJ engine. It is designed to replace the OE Subaru pressed in return fitting and tube at the back of the cylinder head to convert to a -10 male AN. The OEM rubber line often leaks or has poor fitment with aftermarket turbocharger setups. This is great when making a custom AN braided line for a kink-free and proper-sized oil return for your rotated turbo setup, ensuring proper oil flow back to the engine.