Been looking into the pulsar and from what I gather, it really just adjusts the throttle trims. So any fuel savings will likely be seen in stop and go driving and mainly if you run it in eco mode, it will cause you to apply less throttle. That part is appealing as is the ability to shut off the MDS but don't know that I want to pay 600 bucks to do it.
My previous truck was a ram 1500 with a vararam intake, shorty headers and jay Greene custom tune. I can tell you that the only one that made any difference was the vararam and it was only in the upper rpms. The custom tune did very little for performance or fuel economy. Same with the headers, only did them because of the manifold issue but there was no seat of the pants gain. I'm hesitant to start messing with this one