SLP Oil Pump - Which o ring?
Anyways my original one was Tan ,,,so I chose the one that was the closest to the size of my original which was the black one for me and it was also the thinner one.
I have driven it over 100 miles since done and my oil pressure at idle has never dropped bellow 42psi.
So if I were you I would choose which ever one looks the most like the one you took out.


