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I'm looking at adding a pressure box and have been checking out the powerpuck. My issue has been with the TNT tune, when I mash the throttle, I get a nice pop out of the exhaust at 2500rpm and then its fine. Looks like rail pressure isn't keeping up with the quick demand, but then comes up and holds steady at 22 to 23,000psi. What do you guys like for a pressure box and should this solve my issue??? :thumbsup