Is the Evo prewired for these gauges?
Is the installation easy enough to do it yourself?
Or is it better to bring it to the dealer?

 

The guages draw power from the wiring harness for the headunit, but none of the other lines or hoses are already run. They are included in the kit, but unless you know how to cut and splice hoses and lines, I would recommend letting your dealer do it.

Personally, I think the guage pack is too little for too much, but to each their own.