I called my dealer on my new 05 about my chain hitting the sub frame and even the frame itself. Set chain at Min. Spec., and it still hit. Of course they said my chain was out of adjustment, and I am 75 miles from the dealer so solution was needed. (Still working on the warranty thing, but you and I know how well that will go.) Wrapped sub frame from bottom weld 5" up with two layers of black electrical tape for protection. I used a piece of .035 SS cut 4" long (scrap yard), and vise bent it 90 degrees at 5/8", then 90 again at 3/4", and final cut at 5/8 to make a channel. I then bent each edge in slightly to cause tight fit, and it actually snapped into place, and required a lot of force to remove by itself. Notch each end with 4" grinder at the bend 3/8 from end. Make notch with 1/4 left on each edge and same in center. Then simply zip-ty it down just above the weld and at the top. I have rode it hard on some bottoming woops and drops, and I think this will solve the problem. More then enough space for top zip-ty and bottom is low enough to not have contact either. I did not have time to mark up the frame to see if it stopped there also, but based on the layout I think it will. I will check that tomorrow. Yes the chain still hits, but it does not chew it away like the aluminum. I could send you some pictures if interested of the final product, but no camera was around while building it.