Verus Engineering . A0010A

By using our add-on AOS Drain Kit, the AOS can be used for years of service-free life. No need to drain, open it up, or do anything but drive the car! This is optional, only those that want this function should purchase this add-on. The AOS works like a typical drain style unit out of the box. Included: One Way Check Valve Pre-Assembled Push-Lok Hose with 6an Fittings O-Ring Features: Automatically drains oil caught in the AOS back into the engine Does not allow crankcase pressure to enter the AOS via the check val