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Tomei headers have an even 45mm piping from the engine all the way to the turbo
Specifically anodised surface to prevent inside corrosion and surface rust
Designed with a larger breather port over the restrictive OEM design
causing an unnecessary restriction for the turbo's intake
IAG Performance Air Oil Separator AOS - Black - 2015-2021 Subaru WRX / 2014-2018 Forester XT Honda-Civic-Type-R-2023 Tomei headers have an evenIAG Performance Air Oil Separator AOS Black Specs: Product Name: IAG Air Oil Separator (AOS) For 2015 2021 Subaru WRX Part Number: IAG ENG 7187 Material: Cast Aluminum Color: Black Package Includes: 1x Air Oil Separator, 1x Hose And Fitting Kit, 1x Mounting Bracket Fitment: 2015 2021 Subaru WRX 2014 2018 Forester PROTECT YOUR ENGINE The IAG Air Oil Separator (AOS) is a smart investment to safeguard and improve your Subaru's performance. Developed over