Compatibility chart: 2004-2020 Ford F-150 2WD/4WD Specification: The front spacer thickness is appr.28 mm/ 1.10 inch, but it can lift front 1.5 inch The rear block is 2" thickness -2004-2020 2WD has NO stock block, it will provide additional 2" lift. -2004-2008 4WD has 2" stock block, it will provide NO additional lift. -2009-2020 4WD has 1.5" stock block, it will provide additional 0.5" lift. .
