I'm not sure what these are called and I'm not sure when I did this, but I tore one of the plastic (or fiberglass) guards that sit immediately behind the exhaust pipes under the vehicle (when they are running perpendicular to the vehicle). I'm guessing I tore it when I was going through some large gravel rocks recently. Anyway, is this a common thing to break? They seem pretty flexible, so I thought they might bend before they would tear (but I guess not). What are they called? Should I replace them at this point? The tear is about 4 inches and starts at the bottom and goes up. It seems like a part that would be easy to find on a junked LR3; any tips on where to tips on where to find stuff like that? Is there a better after-market part? Thanks.