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The Radium Engineering air-oil separator and return kit for 2015+ Subaru STI includes the parts needed to complete installation and is fully serviceable. It captures oil and condensates from the crankcase vent and returns fluids to the engine, helping manage oil in the intake system. The kit is built specifically for late-model Subaru platforms and includes necessary hardware for installation.
Radium Engineering 2015+ Subaru STi Air Oil Separator-Return Kit
