Ahh the exhaust pipe. Pretty punie in my eyes. They did set it up pretty low, although on my last Show Hauler it was not much higher and I never did rub it on the ground. I even went off road in grassy areas and uneven terrain and still never rubbed the exhaust (came close) Never scrapped the rear over hang out back either, can't say that for my class A which sat higher than either of my Show Haulers.
Actually, I have a nice big 6" exhaust all ready and waiting to replace that scrawny 4".
There is room to move it up and still have better clearance that what is shown there.