I've had mine in for 12K with the CBH, no problems. In fact, just changed my oil and while I had the tube off I checked it and all was fine, looked as clean and like new as they day I put it in. I does help to quiet things down, long trips towing the turbo whine was annoying. My EGT's went down a little with it also. Turbo seemed to spool better. I had some fuel mileage gain with the CBH and the install of an Amsoil Drop in, not sure how the TAG affected things as it went in when all the other stuff was being changed and I only did a 1 tank mileage test with each addition. My had calcs when I added the tag were an additional 1 mpg on the entire tankful but everyone here told me that I would have to do several tanks of fuel for that to really be etched in stone. Overall, I saw about 2-1/2 to 3 mpg increase with the CBH, TAG, Amsoil Drop-in, and air box mod.
CD