I added a vertical exhaust to my TO35. I never hit anything with it, however, in time the weight of the upright exhaust broke off the rear outside corner of the exhaust manifold. Was picking corn and caught the field on fire with under belly exhaust.
I replaced the exhaust manifold and when back to a under tractor exhaust muffler/pipe.
I no longer pick corn with the tractor and the up right muffler was very loud.