Belltech axle pinion shims provide you the solution to easily correct the pinion angle of your rear axle to remove any unwanted vibrations. Crafted of high strength ductile cast iron and include new spring centering bolts. Belltech Pinion Shim kits are available sold in pairs in your choice of 1-6 degrees of angle. Belltech universal extruded aluminum axle shims are sold in pairs and are available in various degrees to solve almost any driveline vibration. Fits 2.5″ or 3″ wide leafs including dual center pin applications. Ships in 1 box Universal Fitment 4 Pinion Shim for 2.5 in.-3 in. Wide leaf springs – (Also fits 2 center pin leaf springs)