TeraFlex JK bumpstop extensions are designed to retain the factory microcellular bumpstop to progressively absorb impact. The upper bumpstop extension has been designed to ‘pop-in’ to the factory bumpstop tower for a simple no-bolts needed installation. The bumpstop extends the effective bumptsop length by 2.75″. Sold as a pair. Fits all JK Wrangler models including Rubicon and Unlimited.