Verus Engineering AOS Coolant Add On Kit - 13+ FRS / GT86 / BRZ / 22+ GR86 / 15+ STI / 22+ WRX

As hot air/oil/water enters a cold aluminum unit, condensation forms on the walls. This causes the nasty slurry/foaming sludge some catch cans experience. With our simple to add coolant kit, you can run engine coolant through the backside of the can, heating it up to the engine’s temperature, greatly reducing this phenomenon. This is a larger issue in cold climates, not so much an issue in hotter climates.