So I did a few things today. I had a borla exhaust on my parts cars that I installed the back muffler sections to stop my cheap ebay exhaust from turning my bumper black. I also tightened all the clamps under the hood I could find. None appeared to be loose. I was a little concerned as the borla is 2.25 vs 2.5 I had. So now I have megan dp/tp, ebay 2.5 resonated h pipe, & the 2.25 borla muffler sections. Low & behold the car hit 16psi & held it to redline. I had to adjust the low & hi settings to keep from over boosting. Not sure what changed but I'm happy.