I just purchased one of these smaller headset expander plugs in an attempt to save a few grams https://www.aliexpress.com/item/1005002091371858.html?spm=a2g0s.9042311.0.0.78e74c4d2cuvam and then noticed that in the info circulating about the upcoming SL7 headset recall, one of the pieces they are going to be providing is a new expander plug.

I know the 168 has a different headset design however is there a reason for concern with these smaller plugs?

https://www.cyclingnews.com/news/specialized-set-to-issue-stop-ride-and-recall-on-tarmac-sl7/

I'm all for losing weight and am trying to do it as much as possible with my 168, however there is no way I'd trust such a small and light expander on a carbon steerer tubed fork, especially for the sake of 30g of weight saving.

There's no science behind this and its my opinion only, however I'd put the longer, stock expander back in if only for peace of mind.