If in doubt rip it out. I used someone elses ARO once, the next day at a major meet, red crap started coming out the pipe and the engine died a sudden death. Later to be found, the silicone insert had separated and shot out the back and wedge in the intake ports.

Removed the said silicon, cleaned the engine and ran it without, didnt notice much of a difference really and I think we still have that engine and runs well.

PS:: Marko, scuff clean some steel with a pad or wet and dry, make a place for one drop of after run, another for one drop of fuel and another for one drop of fuel and after run. Come back the next day and inspect. Ensure there's no adverse reaction with the fuel and ATF/ARO and you'll be fine. I use a gear oil with anti-oxidising written on the front of the bottle if that means anything. So it doenst have to be ATF, it's the fact that many driver have found it works.