Sumo
I also installed based on inputs from this forum and the Promaster forum. I was concerned about the sway that I experienced in high winds which was scary. Since installing the Sumo I have not had similar experiences. We have driven since install in mountains of Vermont, New Hampshire, on Maine on twisty and very windy roads. Overall experience was very good and definitely felt the impact from wind was much less. Felt much more secure driving on the twisty mountain roads than would have thought with such a tall vehicle.
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