I do have the solid motor mount that keith came up with I also have polys in front and teh wheel hop is gone. So I am not sure if two tires spinning would justify stiffening up in s atraight line. If only one did then maybe the flex would cause that. This morning when it was cold It did it so bad I left black marks at a 4K punch to redline and then I smelt rubber afterwards but it still pulled like a monster too. I will try to do fender add-on if possible first.