Timbren 2000 Toyota Tundra SES Spacer KitPopular Timbren SES kits were designed to work on pickup trucks with a standard ride height. But installing a lift kit on your pickup truck will increase the distance between the frame and the rear leaf spring and, therefore, compromise the effectiveness of the Timbren SES helper springs. In other words, your lifted truck is still going to squat even after a Timbren SES rear kit has been installed. That's where an approved Timbren spacer kit can fill