Only second hand knowledge from a thread another forum…I seas reading it because they appear to be the cats meow interns of fuel pumps. That being said, they are EXPENSIVE. Also, unless something has changed, the "install kit" is more of a generic version of a kit that may or may not have everything that you need to install the FP on your particular truck. Furhtermore, (again with a caveat, I have zero actual experience with them) there customer service seems to be a bit sub par.
For more detailed info, do a search on Cumminsforum for "fuel labs" and/or use google and check out what people say when using them on their Chevys and Fords (can I actual use those words here..lol)