F150s Rear Lift Block KitsBlock Thickness: 2inch/pcU-bolts Length: 290mmFitment: 2004-2017 F150 2WD (Raise the rear 2")  2009-2017 F150 4WD (Raise the rear 1/2") Not Fit: 2004-2008 F150 4WD (Raise the rear 0") Easy Install:Step 1: remove stock blocks and u-bolts and change for oursStep 2: align the pins into the axle and tight the lug nutsStep 3: cut off extra lug bolts(opptional)Tools recommendedImpact/Wrench/Jack 【Fitment】Compatibility with 2004-2020 F150 2WD 4WD *NOTE: 2004-2008 F150 4WD has 2'' stock block, it will not lift; 2009-2020 F150 4WD has 1.5'' stock block, it will provide additional 0.5'' lift; 2004-2020 2WD don't have stock block, it will provide additional 2'' lift 【Performance】The leaf springs U bolts is Longer than original bolts, 10.9 grade bolts with 9/16 thread pitch and thicker washer. Made of CNC machined steel, great compression strength 【High Quality Block】Durable finish block with 63.5mm width to keep enough safety contact with leaf springs. The Cross Gusset Plate Locked design of the rear lift block makes the vehicle more stable 【Longer service life】 The surface of lift block is coated with black powder for stronger rust and corrision resistance which can greatly extend the service life, more beautiful and clean