Firstly; I don't 'see it', but there seem to be a good number of indipendant tests proving this works. (in Diesel engines)
Some links to get you started:
https://www.carexpert.com.au/car-new...diesel-engines
https://dfcdiesel.com/2023/05/02/how...iesel-engines/
Home Page:
https://www.speedofair.com/
Youtube:
https://www.youtube.com/results?sear...impled+pistons
I have yet to research this properly but for the moment:
IF they work; How and Why??
aerohead??
This seems pretty easy to DIY.