EGR can be tapped at the merge collector or even just off where 2 of the pipes merge. It might affect the O2 sensor, but I'm guessing it won't be an issue since I think the Hondas have a single sensor anyways and there's cars out there that pull EGR from before the sensors from only half the cylinders.
Worst case, it acts a little funny and you just plug the hole.
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