My car was missing two of the four airbox nuts when I bought it. I sourced orginal replacements last year and fitted them. Six months later two are gone again. I suppose I should be thankful that they did not end up in the timing belt. I’m assuming they rattled off.
I cannot find replacements for the original style domed nuts so Ferrari sent me a different flat style with a different style of rubber washer for underneath. Hopefully these will stay put. They don’t look as nice though.