I also have an AEROQUIP FBM2609 AN-6 ADAPTER, 18mm Oring. I installed it but never ran it. Oring in good shape, $15 shipped. FYI. This fitting threaded all the way in my gm hydroboost. I thought it didn't seal so I changed it out. It looked like the Oring did seal but I've not ran it to confirm. This is the pn on the hydroboost list so I don't know why this happened. Let me know if you have any questions.
Hose kit-Sold.
Eugene
etsai At tx.rr.com
Hose kit-Sold.
Eugene
etsai At tx.rr.com
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