Just my personal opinion, here, but, I think that part falls into the "if it don't go, chrome it" catagory. Can't see where it would help performance. Just some eye candy.
However, I do use the Meziere electric water pump on my ProCharged C6. It flows constant 55 gph vs. the stock pump, where the capacity is based on enginse speed with a 22 gph max.
In comjunction with my Ron Davis radiator and LPE oil cooler, I've never experienced any cooling issues, even with 100 degree temps and hard running.