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where the plastic jet goes through, do you have to modify the bonnet to fit these heated ones, as that may dictate with the OP can go back to standard
News to me, I'm pretty sure all the holes are the same.
I changed out my Mk1 washer jets for Mk3 mist type and they go in the same hole the same way. Both were heated though, but all the pictures I've seen of unheated are the same basic shape.