Take a ohm meter to the OEM speakers and the replacement speakers thru them as installed. The front door panals came off much easier then the rear. There is one metal clip and 6 plastic clips. being as the speaker is in the door and the tweeter in the panel putting it all back together takes some planning. The last connection for me was the network feed to the supply/source. You can see the wiring in a picture. While the door was pseudo connected to the door handle cable and other wiring connectors back in place I propped the panel on my stool and leaned in to make the final speaker connection. Then rehung the panel. It pushed back together real easy. Test it all before resealing all the clips. I would not worry too much about matching speaker impedance within a few ohms. Putting power to perfectly matched stuff still cooks things. The big problems happen to power amps that run away because the resistance (ohms) being low and someone gives it 100% for too long. How long that is depends on the power applied. It's work for you so after installing these you won't blow em.