Searching through the archives I found about a decade old thread on whether the solid rear mud flap was a help or hurt in terms of throwing rocks onto the tow car and whether or not it impeded proper cooling of the Series 60 engine. At that time there seemed to be some controversy on both fronts. At that time a lot of the responders had the 8V engines. My 20 plus year old Country Coach logo mud flap is about to fall apart and I would like contemporary thinking on this subject. We have never experienced any cooling issues with it in place nor have we seen any evidence of it throwing rocks up onto our tow car. Ours is a 40' XL. The original mud flap installed by CC has worn off to nearly the bottom of the SS CC logo and the SS pieces are basically still in place only because of the wire ties that keep the side to side splits in the mud flap from tearing all the way off. So, please let me know your thinking. Thanks.