Lady's and Gentlemen, I have 2002 Cummins, 108,000 K miles, Superchips programmer, 4" Banks exhaust with the power elbow, Airdog fuel pump and a cold air system. I just installed a Wicked wheel. Purchased a boost elbow. Now for the question.......I have a boost gauge, it hits about 19 at max. Do not want to damage my engine but you know how we are.....I would like to squeeze a little extra out of her. What is a safe boost level? Thank you in advance!