Little Bitty O-rings

[Bigmo]

Im putting new injector fuel lines on and the kits have these little o-rings. Didnt see any duri g tear down, what are these for

 

[6.0 Tech]

Im putting new injector fuel lines on and the kits have these little o-rings. Didnt see any duri g tear down, what are these for

Looks like a 6.7 o ring kit.


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[Powerstroke Cowboy]

That's

Looks like a 6.7 o ring kit.


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That's what I'm thinking as well.

 

[DEEZUZ]

Those are for the 6.7 fuel return nipple.