No damage.
4door_Sleeper do you have a fuel pressure gauge, if you did i'm sure the needle would bounce around a little bit without you noticing.
lwboosted What sort of fuel pump to you have, mine is a 500hp pump and it never made the noise until a few weeks of having the malpassi in then only makes it once in a blue moon since I installed the standard reg as well. I' almost certain is the arrangment of the rubber diaphram that causes some noise sometimes.