The Fox 2.0 coilovers are for 0-2" lift. I was told that they come preloaded for 2" and that i would have to back out the nut 1" to eliminate the 2" preload lift since the BDS suspension lift comes with a 4" spacer that goes on top of the strut. The fox tech guy told me that the coilovers would be stiffer than my factory ride for the street and that I would be better off waiting for the release of the front shot/strut instead of going with the complete coilover assembly. The shock alone is supposed to release for $289 each vs the $430 for the one in the mopar kit. So I will install my BDS kit with the factory front shocks until the Fox ones are released in 2 months. The BDS tech guy also told me that he would NOT use the Fox coilovers with the BDS 4" suspension lift as they will be stiffer and BDS does not know the length of them or tested them as thought that I could possible end up with a higher front end than my rear end which I do not want. BDS said their 4" kit was designed around the factory Ram struts and that they offered a Fox shock upgrade for the rear which I am getting.
If you would like to discuss further, PM me and I can give you my cell to talk if you'd like. I have talked to BDS, Fox and Mopar technical guys to make sure what I am chasing does not turn into a lumber wagon if I am dropping $6k on lift and wheels. Been there, done that and it SUCKS! They have had some insightful information, but I really wanted some real world feedback and it doesn't seem that there are many 2019/2020 Ram 1500's on a 4" or 6" BDS kit with the new Fox coilovers.