Perrin Air Oil Separator Black Subaru WRX / STI 2002-2021 | PSP-ENG-620BK Wheel Offset_36mm For use with hydraulic power

For use with hydraulic power steering systems only

the B4 series delivers smooth

Part #: DD0104Q

performance styling with the OEM Subaru Side Strake Kit

Perrin Air Oil Separator Black Subaru WRX / STI 2002-2021 | PSP-ENG-620BK Wheel Offset_36mm For use with hydraulic powerProduct Fitment: 2002 2021 Subaru WRX 2004 2021 Subaru STI The PERRIN Performance Air Oil Separator (AOS) is a premium engine protection system designed specifically for 2002 2021 Subaru WRX and 2004 2021 STI models. This black anodized aluminum separator prevents oil vapor contamination in your intake system, reducing carbon buildup and maintaining optimal engine performance for turbocharged Subaru engines. Key Features & Benefits Advanced Oil