There is no maneuvering speed listed for helicopters as it's not possible to generate enough +ve G with the rotor to do any structural damage. Most +ve G that can be generated from the rotor (without doing some pretty amazing tricks) is about 3G, and the structure is designed for much more than that.
I know of no helicopter that lists a maneuvering speed in the flight manual. (and I've flown quite a few).