Purchased for my 2001 F 350 with 215,000 miles. The difference is phenomenal! This is the 3rd truck I've installed these bushings in and if you have a leaf spring front truck that has over 150,000 miles on it, it's in your best interest to switch to polyurethane bushings and you won't find a better one Find suppliers as Energy Suspension. Installation time is around 4 hours if you stick with it and HAVE THE RIGHT TOOLS FOR THE JOB! The bare minimum you will need are two bottle jacks, jacks or a