This 3MI hose adapter is a must - have for installing IAG Street, IAG Comp, Cobb, and Crawford AOS systems with the 3MI Racing AOS to EJ drain hose. It easily connects these AOS systems to the 3MI drain hose, which you can buy separately. The adapter replaces the 'Y' fitting in the AOS kits. Connect the AOS drain barb to the 1/2 part of the 3MI Racing drain hose. The 5/8 hose goes directly into the top of the center block vent. Our adapter helps convert the hose size from 5/8 to 7/8. Made of 6061 - T6, it's a 7/8 to 5/8 male - to - male barb fitting, a great solution for your AOS setup on Subaru WRX 2002 - 2014 / STI 2004 - 2021.
Using this 3MI hose adapter is easy. First, take out the 'Y' fitting that comes with your AOS kit and replace it with this adapter. Then, connect the AOS drain barb (at the bottom of the can) to the 1/2 part of the 3MI Racing drain hose. The 5/8 hose (the lowest and largest port on the side of the AOS can in IAG's case) should be inserted directly into the top of the center block vent. When installing, make sure the hoses are properly attached to avoid leaks. For maintenance, check the adapter regularly for any signs of wear or damage. If you notice any cracks or looseness, it's time to replace it. Also, keep it clean to ensure a long lifespan.
