Well after a month of driving around with the brake duct on one side it finally got torn. It happened when I went onto a lift and the rolling body jacks where sticking up a little too high. Other than that, the duct has held up perfectly, and Ive had no issues with it what-so-ever. Over the course of the month I have seen temps differ as much as 100 deg from ducted to unducted side. I guess the test is over and Im going to rig up the other side.