Holley tubular swap headers MIA on website. Reason?

I've notice for some time that the tubular headers Holley has offered in the past for Hemi swaps seem to be missing from their website. I haven't looked hard mind you, but I did go looking for some for a Dakota swap (BH2374) just out of curiosity and only found their cast iron manifolds offered.

Just noticed the following note on their manifolds:

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I wonder if Holley was pressured to remove stuff like the headers due to the lack of emissions controls (catalytic convertors) being installed on the swap vehicles? EPA forcing them to not sell stuff that would make it hard to include things like that?

Just tossing it out there. Curious if anyone has any facts or insights.