Feels smooth power delivery wise, but I was told the procharger come with a 4.38 pulley and mine came with a 4.0, shouldn't I be making more boost that just 5psi? I thought with stock pulley I was supposed to be at 7psi
Not sure about the pulley size. That'd be a question for Procharger. The lower psi you're seeing could be because of less back pressure because of your LT headers. That's actually a good thing. I doubt your belt is slipping. Do u have a boost gauge? I'd probably call Procharger. If everything is on there right and you're really making 5psi, u just need a different pulley with an updated tune and you should be making big power.