Verus Engineering AOS Coolant Add On KitOVERVIEW Add a heater to the AOS to keep the unit from creating condensation build up. This nasty slurry typically gets associated with catch cans. By increasing the temperature of the aluminum unit, the hot air no longer causes condensation build up. The kit comes with everything needed for an install on your BRZ FRS GT86 and VA GR GV Subaru STI. WHAT IS INCLUDED Banjo Barb (2) Banjo Bolt (2) Banjo Washer (4) Hose Clamp (4) Coolant Hose Coolant Block