I'm not running the fuel cell....I'm running their tank. Its designed to accept the TJ fuel pump. Plug and play. Only issues that I had were making the emissions work but I got that figured out. Here is a post that details everything: Gas Tank Post
OK. Their fuel cell has the cutout for the stock fuel pump/sender but then you still have to mount it.
Their tank isn't large enough for me as I want a 20 gallon or as close as possible to that.