I've owned my 2009 Fat Bob for 13 months here in Southern California, ridden it in all four season's climates, including our 100+ degree summers, and never felt heat coming off of the engine to the degree I wish it were deflected. In fact, now in late fall/early winter, I wish the thing would direct some heat ONTO the old thighs to warm them up. I guess the point is that I'd keep the bike's look clean and put the money into something else.