That is what I've been told, but I haven't been able to confirm.
Assuming you're talking about the never ending part...
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I am sure there was some sort of time-limited agreement in place, which is why the HiFlo RC version showed up right around the time the KN switched suppliers.
I have used the regular HiFlo for a while now wihtout incident. I was using the Baldwin and the PerfForm, but I like the HiFlo construction better. I'll be cutting into the RC model soon.
I've been using the hi-flows for some time too.
It's what Eric uses, and Bruce was using them when he had the dealership, and it is over 10 years now since he's been out of there. I was buying them, and 10 year old Michelin DOT track tires...'cuz they were cheaper than Duc OEM filters and Michelin street tires.