I bought the Desert Does It seat risers for my five foot tall wife. My new SR5 Tundra does not have a power passenger seat and the seat was very low to the floor, leading to complaints from my wife. She was actually very pleased with her new perspective from the seat risers. Install was super easy.
Did a 500 mile trip in my 06 and it wasn't awful, but wasn't great. Put these in, thinking they might make a difference. Immediate improvement. These make our first gen tundras more comfortable than a 2nd Gen.
