Can't find the specs of the stock speakers in my car...

[El Flama Blanca]

I have the part numbers and I've looked on tons of websites but none of them show the specs of the speakers. Such as max wattage, ohms etc. Any idea where I can get this..

The part is 86160-53210

[Lexus Owners Club]

4 Ohms but not sure of max wattage though