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Technically that is true. At simplest, you can't mod the power train from intake to cat (except for the filter) unless it's CARB certified for your year car. This includes intake tubes of all things.
I would think the red manifold falls under this category as well, as it is certified for MY17+.
In practice, I'm not sure you will ever get cited for it, but at the same time if you do, they could require you to remove it. Same playbook for aftermarket headers and even intakes. It really comes down to the cop who pulls you over and the inspector who looks at the car. Will they notice? Will they care? Depends
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