Its not that its a honda brand...and its a sticky question.

Some dealers will warranty you with anything, as long as the modification doesnt cause the problem. These dealers are intelligent.

Then you have the dumbass dealers (95% of them) that wont warranty anything. Theyll make up some excuse, even with a Comptech part "we didnt install it" "we only warranty parts that we order from Comptech" "it could be fake" or who knows. Why do they do this? Because most idiots will just go "oh ok" and walk away.

I would check with your specific dealer instead of asking on here.