Rear inlets are cut to get them out..
In tha case, leave the inlets on and just say that you noticed a crack in the plastic and replaced it because you didnt realize it was an item that was warrantyable. Just try and act smart about the reasons why and the warranty company should accept it. Injectors are not related to the inlets so you should be good either way. Turbos, would be the questionable thing but im sure inlests are less of an issue vs outlets.