Prep Work And Check List
Clean the Surface of the Box sides on your truck with denatured alcohol or wax remover. It is IMPORTANT that the surface is clean so that our Box seal will adhere properly to the Truck box.

Install Rails And Seals
1. There are two rails. Put the rail with the 3rd leg hinge clamp (Fig.1) closest to the cab on the bed rail. Make sure the rail is as close as possible to the cab. Remove the blue paper. Push the rail down, then do the same for the other side.
2. To clamp the rail on the truck bed use a 5/16” socket, wrench or drill then tighten the screws on clamps. Be careful not to over tighten! (Fig 2.) You may use the preset spots on each rail.
3. The first step in installing the Box Seal is to place the guide on the outside of the rail by the cab.(Fig 3)Then, remove about 8 inches of the white pager from the Box Seal. Place the Box Seal on the outside of the guide. Gradually, pull the white paper back and push the Box Seal against the guide and rail. Do this on both sides. Finally, remove the white paper on the D-Seal and place it at the end of the rail by the Tailgate.

Install Advance G3 Supra Cover
1. Place the 3rd leg hinge, which is on the cover, into the 3rd leg hinge clamp on the rail. The yellow warning sticker on the cover will be facing up. (Fig.5)
2. Step back behind the tailgate and center the cover. Do not center cover to the Box Seal, center the cover to the Truck Bed.
3. Tighten down the screw in the 3rd leg hinge clamp with a 5/16” socket , wrench or drill.
4. Fold the cover over the truck bed. (Fig. 5) For detailed instructions see the yellow sticker under the cover.
5. Tighten the lock nuts on all clamps and both 3rd hinge leg clamps. Use a 3/8” wrench. (Fig.6)
Routinely check all clamps after installation.

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