what is with the opening at the top of the fender well being left unprotected? have been doing some wheel work recently and it is starting to irritate me that all road debris/water is left to splash directly on engine/exhaust. unsure whether this is a factory oversight or shop not reinstalling the guard but need to buy/make some protection to prevent problems. anyone buy these anywhere.... or make their own? any tips/info would be appreciated. thanks to all.