Installation Guide

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PAGE 4
Choose 10 holes, identified by the
black dots, that correspond with
your individual vehicle configuration.
Front of truck
Row 1 Row 2 Row 3 Row 4
Rear edge of truck bed
Each base rail must have a bolt in
either of the marked holes. Check
for obstructions before drilling.
Measure diagonally from
the same reference point.
Measurements should be
the same each way.
Rear edge of the truck bed to
the rear edge of the base rail.
Step 3
WARNING: Check for obstructions prior to drilling. Failure to do so
could result in damaged fuel or brake lines, structural members, etc.
Drill the 10 holes identified in the figure above. Note: Hole location
will vary for all applications. Drill all holes with a 3/16" drill bit first,
and enlarge them with a 17/32" drill bit.
Insert 1/2" - 13 x 2" carriage bolts (#8) into each hole.
Insert 5/16" U-shaped spacers (#6) above or below the
truck bed to fill corrugations in the bed floor.
Note: The Toyota Tundra application requires CURT #16302
spacer kit. Stack one 3/16" and one 5/16" U-shaped spacer
to avoid crushing the truck bed.
Step 4
Install the mounting brackets over the carriage bolts (#8) with the
long mounting brackets (#2, #5) on the front bolts and short mounting
brackets (#3, #4) on the rear bolts. Note: Long and short brackets
can be interchanged as needed.
Secure the carriage bolts (#8) through the mounting brackets with
flat washers (#11), lock washers (#9) and hex nuts (#10). Secure the
last four carriage bolts (#8) through the truck bed with flat washers
(#11), lock washers (#9) and hex nuts (#10). Torque all nuts to 110 lb-ft.
Step 5
Drill two holes in the frame for each bracket. Select the holes that will
give the largest spread between bolts. Install eight 1/2" - 13 x 1-1/2"
ribbed neck bolts (#7) with the threads pointing outward, lock washers
(#9) and hex nuts (#10). Use the provided fish wire (#15) to pull the rib
neck bolts though the frame as needed.
Tighten the nuts until the bolt heads seat. Lubrication of knurls
of all rib neck bolts is recommended. Torque all nuts to 110 lb-ft.
Note: On vehicles with heavy-duty suspensions, check for
interference with the bolts where the brackets are mounted to the
frame. If there is interference with the suspension springs, cut the
bolts flush to the nut outboard of the frame or use the weld option.
INSTALLATION (CONTINUED)