complete cng setup for diesel engines, 3 years old. taken off a 2005 Duramax I just bought. works great, just too lazy to fill two fuels. I have everything that was needed for it to be on my truck, works great for power and fuel milage! with it my truck went from 12 mpg to 20 mpg! a lot more power with it as well! have the tank which is good until 2032, the regulator assembly, lines, connector, tank straps and cover. obo, just want it to go to someone who will use it