I place an order with Jack Cotton, about a month ago on Double pumper. There was some sort of back order or something and he told me was that it was about 3 weeks wait...I got it in about 3 days ago, took about 1.5hr for the install and thats taking my time and making sure everything is the way I want it..So far so good. I know that I havent been driving with it that long, but 600 horses you would want more than a single walbro 340....IMO..Carlos