BAKFlip MX4 EZ-Lift Hard Folding Tonneau Cover for 2015-2020 Ford F-150 (5'7" Bed)

Here's the short version. Follow BAK's install sheet (below) for your truck's exact clamp positions and settings.

1. Clean and seal. Every spot where the cover mounts must be clean. If your kit includes a bulkhead seal, clean the top of the bulkhead with soap and water, then isopropyl alcohol, let it dry and stick the seal from one edge of the bulkhead to the other, trimming the excess. A truck with a drop-in bed liner doesn't need the seal.
2. Set the side rails. If your kit includes rubber filler strips, stick them between the plastic bed cap and the metal rail: one 6-8" from the bulkhead, one as close to the tailgate as possible and one centered. Fit the drain tubes to the front of the side rails, then set each rail flush with the top edge of the bed rail, drain-tube end toward the cab, pushed all the way forward and square (90°) to the bed rails so the rear latch engages. Route the drain tubes behind a bed liner, through the bed plugs or through a 5/8" hole drilled in the bulkhead.
3. Clamp the rails. Attach three clamps per side: the front one 6-8" from the bulkhead, the rear one as close to the tailgate as possible and one centered, at the filler-strip spots if you used them. Push the back of each clamp up as high as it goes, keep the rail level with the bed cap and square (90°) to the bed rails, and tighten to 10 ft-lb with a 1/2" wrench or socket. Don't over-tighten; clamps tightened too fast or too hard make the rails lean.
4. Prep the cover. Slide the two cover retainer clamps into the track under the cab end of the cover. Stick a gasket under each buckle end and screw the buckle ends into the pre-drilled holes on the front header panel; if your kit has wedge stops, fit them the same way with their gaskets. Hand-tighten only.
5. Set the cover and engage the lift springs. Lay the folded cover on the side rails at the cab end, centered, and turn the retainer clamps clockwise until the lock washer is snug. Clean the cab end of the cover, then stick the bumpers evenly along its top edge where it meets the cab. Pull the pin wherever there is a spring to engage the EZ-Lift system; if it doesn't catch at first, fold the cover down and back up a few times.
6. Unfold, adjust and check. Unfold the cover toward the tailgate and center each panel side to side and front to back, with the rear edge and tailgate seal resting on top of the tailgate. Release each latch to check it engages the rails (the sheet shows how to adjust a slam latch), then re-tighten the retainer clamps. After that, check now and then that the clamps and retainer clamps stay tight, as the sheet's care section asks.