I originally bought these as I wanted to upgrade the pickups of my Esp Ltd EC-50. The installation was made super easy by the EMG solderless system and easy to read wiring diagram. Since then I have lost the wiring diagram, but was able to change these pickups to another guitar without any problems. The only thing to consider is that these are active pickups, and if you replace passive pickups with these, you will need to find some room for the battery on your guitars back cavity, and at least for me that was kind of a tight fit.