Slightly off-topic but somewhat related…
In the motorcycle and auto worlds there have been various posts and threads of issues getting warranty repairs approved with K&N filters installed. Sounded like the common theme was the authorizing body at the repair facility was flexing their muscle and requiring the owners to show documentation of the regular maintenance being performed on the filter. In the case of do-it-yourselfers, they were looking for receipts for the “recharge kit” and a “log” of sorts.
I’m a gear-head, I get it! Let it breathe and feed it more; intake, exhaust and tweak the fuel mix! J
Just be prepared to show proof of maintenance.