My R32 V-Spec II has them, but I have only kept to the tow point of the factory part, cut the rest off, installed a PCV downpipe section to convert the 4"x1.5" duct into a round 3.5" duct and run heat tollerent flexi ducting back to the rotor centre.
The item on my car that isn't in that pic is an extra air guide on the castor rods... again, cut and shut the air guide and its now just a bracket that the ducting is braced to.