Installation Instruction Manual
Extang Corporation, 5400 S. State Rd., Ann Arbor MI 48108, 734-677-0444, Fax: 734-677-8409
Visit us at: 
extang.com
6
Insert side 
rail clamp 
all the way 
into rail.
Insert side rail clamp all the way into rail.
Note: For over-the-rail bed liners refer to 
Diagrams A and B below.
Insert bow onto top or bottom peg.
(Top peg for performance, Bottom for good 
looks.)
Ends are spring loaded 
for easy installation. 
Push and hold on 
spring end and let the 
other end slide on with 
the spring action.
SPECIAL
FEATURE:
Two pegs 
offer two 
height
adjustments.
Note:
Bow End does not 
fit between pegs.
For each clamp mark on your bedliner a 1-1/2” x 3” 
hole as shown above. Remove clamp. Cut holes in 
bedliner. Reinsert side rail clamp. Return to step 5. 
Side rail clamped to bed 
with bow attached.
A
87
STANDARD CLAMP
IMPORT CLAMP
Clamp Spacing (Same for each side)
See the stickers located on each side 
rail for clamp position, or refer to the 
dimensions given below.
Note: Remove stickers 
after installation.
B
Longer Clamps
Some trucks use two lengths of 
bracket to fit sculpted sidewalls. 
Longer clamps go in the 
forwardmost (Cab) positions 
while the shorter pair hold the 
rails at the rear (tailgate) end. 
5
9
EASY USE OF TRUCK BED
Tarp may be rolled up and secured 
with Velcro® for bulk hauling
A. Release lever on both corners 
of tailgate rail and tilt rail up.
D. Finish attaching tarp along each side by 
pushing down and sliding you hand towards 
each corner. You can feel the “grip” action.
C. Close-up of downward rotation of 
rear rail. You will feel the “snap” effect 
and see it tighten snugly.
PUSH
DOWN
PRESS & SLIDE 
YOUR HAND
B. Attach tarp at front by 
pressing down on edge of tarp 
with the palms of your hands 
(about only 12 inches on each 
side). Then hook tarp to the tails 
railʼs groove and click down to 
tighten tarp. See close-up. 
DIAGRAM
Upper
Peg
Lower
Peg
Do Not 
Place 
Between 
the Pegs
For an OVER-THE-RAIL Bedliner
DIAGRAM
LONGBED (4 clamps)
SHORTBED (3 clamps)
Short Clamps
Long Clamps
Short Clamp
Long 
Clamps
FOR INSTALLATION 
IN THE FOLLOWING 
TRUCK MODELS: 
Ford HD Long-Bed
Ford HD Short-Bed
Place Clamp
Here
STICKER
Place assembly
over truck box. Center 
between cab and tailgate.
Off the truck bed, 
connect the end rails 
to the two side rails.




