I have a fuel cell, but not fully mounted yet. I don't like this one, so I'm just waiting to get the right one. I will be flush mounting it to the floor and deleting the spare tire well. I'll be using a 45 degree filler neck to tie in to the stock filler cap. It will leave the hoses sticking up from the trunk floor, but there will be 90's on those. I have a trunk model, so I can live with that. I'm running a fats system too, which is kinda ugly. I' don't know if you plan to drive this much, but from a daily driver, I hate the whole digging in the trunk and shoving a gas noozle in my car thing, everytime I fill up, every 8 gallons!