IBR Air Oil Separator - Subaru STi 2004-2021 / WRX 2002-2007 / FXT 2004-2008 BMW-335xi-2008 Thanks to their uniquely shaped

Thanks to their uniquely shaped projector lenses paired with modern optics within

Steel socket head screws are set in a counter bore for a flush mount and provide clamping force to firmly hold the upper and lower slider shafts in place

Throwout bearing

smoked central lens

IBR Air Oil Separator - Subaru STi 2004-2021 / WRX 2002-2007 / FXT 2004-2008 BMW-335xi-2008 Thanks to their uniquely shapedThis kit is designed to be the best AOS on the market. It is a triple pass system with carefully designed diameters and cross sections to effectively remove a range of oil droplet sizes. This AOS installs directly above the main crank case vent between the intake manifold and the TMIC. Installing here allows a clean look and the shortest possible hose routing. Since this is a true AOS the oil drains back into the block and never needs to be emptied.