9. The main component of TCP’s leaf spring rear suspension kit is of course the pair of leaf springs. Available in several spring styles, we opted for the 4�-leaf mid-eye spring. The extra half-leaf helps prevent spring wrap during acceleration and offers additional stiffness. The spring comes with a front-eye-bushing made from rubber. We’re using a press tool here to remove it in anticipation of upgrading to polyurethane bushings.