I don't know if this helps, but I have done a fair bit of research as far as trying to upgrade my coils in my 2016 - I was trying to get a stiffer set. Basically the front coils are unique in that nothing else will fit and no other upgrades are available on the planet. Dodge parts guys don't even seem to be able to get their actual dimensions, which seems weird, but they are not privy to that info. So in your case if you wanted to know any details you would have to find a power wagon and measure them. The part no.s themselves are easily obtained from the parts guys at Dodge.