Roger GreaserMarch 11, 2021 at 7:14 pm 4 out of 5 I would like to first make it be known that super springs customer service is top notch. We had an issue with shipping and they immediately took care of the issue. Installation of the sumo springs on a 2021 4runner was very simple. I was able to try them out today and they seem to perform well. They still allow my suspension to articulate when off roading but definitely helps with stabilizing the ride when hauling my cargo trailer. The only concern I have is that the sumo spring didn’t line up perfectly with the axle, it just didn’t have enough adjustment to get it perfectly lined up. I honestly dont think this will be an issue though.