These will work for you but they will need to be notched out to make room for the hump that is in the front wheel well. They are not a custom fit for the RAM.
We do have 2 custom fit options for the 2018 RAM 2500 HD
With OEM flares - https://www.sharptruck.com/truck-hardware-gatorback-mud-flaps-gcr31f-bk
Without OEM flares - https://www.sharptruck.com/truck-hardware-gatorback-mud-flaps-gcr32f-bk
Verified Answer
Admin answered on 2/21/2019