Just installed a set of these springs on my 2003 Insight. It has just under 64,000 mi. Simply put the ride quality improvement is AMAZING!!! I installed these and the Gazmatic shocks. At first I was skeptical about them but after watching "Killer 3 Cylinder" on YouTube, I decide to try the set. I drive 72 miles round trip to work each day and the rear suspension bottoming out on the bump stops was getting old quick. I would highly recommend these springs for anyone who wants very noticeable ride improvement!!!