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-8AN drain outlet fitting
Rust protection with a 30 micron plating
Powder-coated hyper pink to add more color and style while being corrosion resistant
Glossy carbon fiber construction
COBB Tuning Air Oil Separator Black/Red - Subaru Models (inc. 2008-2021 STI / 2008-2014 WRX) PDM_air-boxes -8AN drain outlet fittingKeep Oil Out of Your Intake Charge The Cobb Air Oil Separator for the 2008 2021 Subaru WRX STI captures the oil vapor that the factory PCV system vents back into the intake path and separates it before it reaches the turbocharger and intercooler. On a turbocharged Subaru EJ or FA engine, PCV oil vapor coats the inside of the charge pipes, intercooler core, and intake manifold with an oil film over time reducing intercooler efficiency and introducing
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