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OEM for sure for longevity.
That said, I used a Dorman a few years ago in a pinch, ran it for over 2 years without any issues. I replaced just this last year with OEM when I did new injectors (among other things). It looked fine. I kept it to throw in the spare parts tote that I carry on trips.
I would totally avoid the Chinesium ones on Amazon though.
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