Ryan CastroOctober 5, 2020 at 7:12 pm 5 out of 5 I am a rural vet and have a truck with an 8ft bed with an 8ft vet box with a tank of water and all my equipment. It weighs down the back of my truck. We bought the sumo springs to help with the weight load of the back. Holy cow, I could tell a huge difference the first time I drove it after installing. Installing was very easy. I can’t wait to tell my fellow vets who have boxes in the back of the truck. World of difference!