Do people break motor mounts in the 4runners when out playing hard ?
while I have never run poly mounts on a Toyota, I have on several cars, of course none were stock (car) but the vibrations were not worth it to me on a street car ( would run them on the engine and tranny mounts) but on my autocross BMW's with all the other mods, on the track, the extra vibrations were not that noticeable until I was on the street and not drifting etc.
Our v-6's seem to be a pretty smooth running engine, so maybe the vibrations would not be that bad
then again, IM not out there with a supercharger, torqueing the crap out of it on a steep hill climb etc.