Belltech BUMP STOP KIT REPLACES 4900 4903 4915Belltech Bumpstops are designed to complement any suspension kit. The microcell elastomer polymer foam bumpstops provide a progressive rated pad to reduce harsh bottoming in case of a severe overload. Acting as a secondary spring, Belltech's microcell elastomer polymer bumpstops progressively increase in rate as they are compressed which offers a much improved feel during engagement over traditional solid polyurethane bumpstops. Sold in pairs.