It's really not that hard. remember,.... Lefty loosey, righty tighty.
You will need the right size socket of course. You will also need a torque wrench so that you can tighten them correctly. BE SURE to use a anti-seize compound so that you get the right torque. This is applied to the threads.
You will also need the right grease to put on the ceramic of the plug and spark plug boot so the next time you will be able to remove them. You can apply that inside the boot with a Q-Tip.
The correct torque is: 13 lb. ft., 156 inch pounds
If any other questions/problems, feel free to contact me
Greetings, Earthling. We come in peace... Never mind "Paris to Dakar", the VehiCROSS looks ready for the Martian desert.