VERUS ENGINEERING A0416A AOS Drain Kit for SUBARU WRX / STI (VA)

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VERUS ENGINEERING A0416A AOS Drain Kit for SUBARU WRX / STI (VA) The VERUS ENGINEERING A0416A AOS Drain Kit is an optional add-on designed for Subaru WRX / STI (VA) models to enable automatic oil return from the Air Oil Separator back into the engine. When installed, this kit allows the AOS to operate with minimal maintenance by eliminating the need for manual draining or periodic disassembly. This drain kit is intended for users who prefer a service-free configuration over long-term