I'll be brief

Buy them from a guy on fren readytorace.fr (french forum)

Before :



Takes 5 minutes to mount (6 screws) :






After :




Did not have the time to start the bike but I think it's gonna be good !!!

I didn't change airfilter for now so I don't now what the gain will be but will report as soon as tested on road

They look quite neat mate.
Maybe orange foam...?

Yep I am going to look after it... Now It's kitchen air extractor foam... Can do better

you don't need to filter the air there as it is sitting in the unfiltered half of the airbox.

so would ditch the foam altogether

Yes the guy I buy it from only used the grid part without filter when he goes to track, he adviced me to put the foam only to prevent to much insects and little stuffs from coming into the airbox even the bottom part