I dyno'd my truck Fri., and it was down over 20lb/ft of tq and 11hp. The air/fuel was good, the only changes I'd made was a cat back and C&L aluminum air inlet tube. I ran home, got the stock rubber tube, and the power was right back up where it had been (almost, but it was much hotter Fri. than my previous pulls). Just to be sure, we put the C&L back on, and the power dropped off again. Anyone else dyno'd this part?