I installed them on my 2007 Toyota Tacoma and they worked fantastic! I had a little suspension deflection (within tolerance) with a load of 1000 pounds of balls! Not what I would recommend for a Toyota Tacoma, but you get minimal body roll and an improved ride with any type of medium to heavy load like firewood, motorcycles, etc. Note; You'll have the same ride comfort as you do now, with no load, since timbres don't come into play. only when the truck is loaded! I just bought these for my new Toyota Tundra which I think should come standard with extra rear leaf springs. Because I use my truck for heavy loads, trailer towing and more. The Timbren is a steal over more expensive airbags without the headaches of maintenance and other hassles. Timbrens are easy to install and once installed you don't have to worry about them anymore. So I highly recommend this product if you have a Toyota Taco or especially a Tundra truck.