Can anyone help me out with understanding fuel bar stuff. I've seen many sites regarding tuning my engine and they mention that you need to run at least a 3 bar set up and stuff like that. I've also seen a few of the members who list in their mods that they are running a 3 bar or 4 bar setup. It is to my understanding that these numbers are refuring to some sort of pressure system. But what does it all really mean?? Also what is stock?? When is it important to upgrade to more bars as they call it? Thanks for any info that mey help clear up this confusing jargin I keep reading about.