Verus Engineering AOS Coolant Add On Kit - FK8/FL5 Honda Civic Type RVerus Engineering AOS Coolant Add On Kit FK8 FL5 Honda Civic Type R Add a heater to the AOS to keep the unit from creating condensation build up. This nasty brown 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 Honda Civic Type R. Science: As hot air oil water enters a cold aluminum unit,