I was looking for a basic system that just uses boost pressure and did not need connections to the MAF or drilling for egt's. This one does that. You can start the spray at any where from 1 psi and up. The only negative is that the end range is 35 psi, so technically if you want all the dots to line up, the range should go past 40psi. Not sure if 40psi of boost is a real number for a stock truck. Comes with 3 nozzles and I'm using the smaller one right now.