You would be better off painting the struts rather than having them powdercoated. It can be done with a similar look provided you're careful in the masking and spraying.
Though there has been some
issues with the fitment with them causing the hood to bow up.
As for the hoses, all of them except for the
Z1 Silicone Heater Hose Set are easy to install. Remove the clamps off the old hose, remove hose, place clamps loosely on new hose, install new hose, reinstall clamps.
The heater hose is one best left to a shop to deal with as it's location and complexity to get to. I let Z1 install that one.