Radium Air Oil Separator - Universal KitThe Radium Engineering Universal Air Oil Separator (AOS) Kit is a complete solution for custom crankcase ventilation builds where a vehicle specific kit is not available. CNC machined from billet aluminium and anodised for corrosion resistance, the AOS captures oil mist and vapour from crankcase gases before they re enter the intake system protecting intake valves, intercoolers, throttle bodies, and intake manifolds from oil contamination and carbon