Back modern springs are notably modern, but under more compression change characteristics become more linear. This gives an incredible feeling & feedback of the car in every various track conditions. Marked with TWO dots for simple identification. Set of 2. Available as moobs, the springs are individually calculated, handled, analyzed and matched to produce identical damping traits. Through selection procedure, each spring is compressed in several fine increments as well as values recorded, after which it each springtime is matched with another springtime of identical characteristics. XRAY goes the additional mile to be sure perfect springtime fits, providing your car or truck the predictability and perseverance you will need to help you lead the pack.