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Re: What size are the HPOP fitting internal o-rings on a 7.3 PSD
Posted to HD/Fleet Forum on 4/5/2018

The orings are #6 - if I had one of those and it failed I would go back with the #6 orings boss fitting all around with a 37 degree jic fitting on each end - the are cheap and easy to work with and don't blow off on the side of the road... Login to read more.