Ride Height Adjustment Shim 0.125 Thick, Front Suspension Spring See #13 In Illustration. FITS 1980-1987 XJ6 and All XJS. Add or subtract these to adjust front ride height. Each ring adjusts the front ride height by approximately 3/16 inch. You can use a maximum of two rings per side. If you need more than two then you need new springs. Sold Only As A Pack of 2 (C41271)