The Rock Krawler coilover listed for the X Factor Pro Aluminum Trail Runner system is part of the 4.5in Trail Runner configuration for 2019–present Jeep Wrangler (JT) models. This coilover pairs with the Pro Aluminum Trail Runner components to provide the spring and damper combination specified by Rock Krawler for that trail-focused 4.5in upgrade.
Rock Krawler 2019+ Jeep Wrangler JT 4.5in X Factor Pro Aluminum Trail Runner System