Hmm stacks originated back with farmers, reg under the body exhaust. When the engine backfired could cause the crops to catch fire. Hence the term smoke stacks, this way if the equipment back fired and didn't blow, the exhaust tubing apart no need to worry.
Also most of yall talking **** about stacks, are prob city boys. Nothing wrong with that btw but I like mud,rocks,hills, water crossings. I've gotten stuck in a mud hole I was actually on the outter part when the shoulder broke. Any ways I had the std down the frame and out the rear behind the tire exhaust. NC muddy,river creek water,sand decided to flow all the way to where the cat meets the manifold.
Unless your sitting up high, I'd run a snorkel and stacks anyday. and for a dedicated offroad rig I'd turn the headers up. Run it right out of the hood.