Given the engine question, a conversation came up and work and I was trying to think of true F1 to non-race car tech transfers. I mean we hear via marketing about all sorts of F1 inspired and F1 technology in this car or that. I'm inclined to believe most of the claims are pure BS.
F1 is a place where many racing technologies originated (suspension inerters) and where many technologies were incubated for racing (composite construction) and where ideas that started in other series were often brought into high art (ground effects and racing aero in general). However, I can't think of that many significant transfers to road cars and certainly not in recent times. I mean we do have some "F1 inspired" ideas but those seem to fall into simply copying for the sake of creating an artificial link (Ferrari's steering wheel knobs) even though the underling technology isn't inherent to F1 or sometimes stuff that is only coping the general idea while the implementation is much different (paddle shifting). I mean the design links between the F1 versions and the road car versions are likely rather weak given the much different needs of a road car vs race car system. It's also worth noting that the general concept predates it's 1989 use in F1 and the DSGs that have become the preferred paddle shift design in road cars are mechanically very unlike an F1 box in mechanical or software design.
Many engine technologies don't transfer such as the valve trains. Others like turbos and fuel injection seemed to have developed in parallel. F1 might have done a lot with turbos in the late 70s and early 80s but so were companies who weren't in F1 such as SAAB, Mitsubishi and Porsche who used them in other racing applications.
Brakes are the only recent thing I can think of. While F1 didn't invent ceramic brakes they did spend the money on researching them and I bet that did help with the knowledge needed to make road car versions even though the road car versions are quite a bit different than the racing versions.
Certainly when looking at racing in general we can find more examples of transfers but in this case I'm only talking about F1 specifically.