Rear Brake Cylinders: How to Tell the Difference?
If you can believe specs posted on EBay, there is no verifiable difference between the two, both listed a having 15/16 inch bore size. Only "difference" I can see in the specs is that one weighs a "hair" less than the other.
![cylinder 18E584.png cylinder 18E584.png](https://www.forabodiesonly.com/mopar/attachments/cylinder-18e584-png.1715696712/)