Ideal for a 2001 Tacoma Double Cab. Installed on a truck with a mileage of 250 km on the original springs. They restored the arch and added much needed height, about 2 inches. The reviewer who had uneven results from side to side probably installed backwards or forgot to tighten the dampers at ride height. Installation requires large C-clamps, they are under significant stress when fully bolted. Be careful!