Just installed the Provent on my 2017 Trailhawk, at 122,000km. Now at 124,000km and so far no oil in the outlet tube!
I do believe there are slight differences in the 18+ models that will mean you need to tweak the mounting a little to get it fit easily. On my 17 it was awkward.
These were the photos I took when I finished the install.
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