ROUSH 421406 User manual

1313-17F957IM-AA 20120803RA Page 1 of 25 1-800-59-ROUSH
2013 Mustang Rear Valance Kit
P/N: 421406 (R1313-17F957)
Application: 2013 Ford Mustang
Note: Roush rear valance kit will only work with the Roush off road exhaust system
P/N: 1313-5231.
Installation Instructions
Before installing your ROUSH Performance Product(s), read through the entire installation
procedure and check to make sure all items are present. Contact ROUSH Customer Service at
1-800-59-ROUSH, weekdays from 9:00 AM to 5:00 PM EST, with any questions regarding fit,
missing parts or instructions that are unclear to you.

1313-17F957IM-AA 20120803RA Page 2 of 25 1-800-59-ROUSH
EQUIPMENT AND SUPPLIES REQUIRED
Ratchet ●Safety Glasses
7 mm Metric Socket ●8 mm Metric Socket
Die Grinder ●1/4” Carbide De-bur bit
Air Saw ●Drill
1/8” Drill Bit ●Center Punch
1/4” Drill Bit ●3/8” Drill Bit
9/16” Drill Bit ●10 mm Wrench
Torque Wrench ●Commercially Available Clear Coat
Description
Part Number
Qty
2013 Mustang Rear Bumper Cover Valance
Kit
R1313-17F957
1
Rear Bumper Valance
1313-17F957
1
Rear Valance Tape Kit
1313-17F957TAPE
1
Rear Valance Template
1313-17F958TMPL
1
Installation Manual
1313-17F957IM
1
Rear Valance Hardware Kit
1313-17F957HK
1
U-NUT #10 X 20MM Wide x 31 MM LONG
19339B
12
J-CLIP, M6 X 1.0 SHORT
N623332-S439
4
W-Clip - Rear Valance (11440-NT-201)
W9X14
2
BOLT, M6 X 31 Hex Head Flange & Washer
R18020009-00
2
Fastener - M6 X1.0 X 22
R18020057-00
4
M6 Nut
W704521-S437
2
3M® Adhesion Promoter
021200-27571
1

1313-17F957IM-AA 20120803RA Page 3 of 25 1-800-59-ROUSH
LIMIT OF LIABILITY STATEMENT
The information contained in this publication was accurate and in effect at the time the
publication was approved for printing and is subject to change without notice or liability.
ROUSH Performance Products (RPP) reserves the right to revise the information
presented herein or to discontinue the production of parts described at any time.
SAFETY REQUIREMENTS
STOP! READ IMPORTANT SAFETY CAUTIONS AND WARNINGS BEFORE
PROCEEDING.
IMPORTANT SAFETY NOTICE
Appropriate disassembly, assembly methods and procedures are essential to ensure
the personal safety of the individual performing the kit installation. Improper installation
due to the failure to correctly follow these instructions could cause personal injury or
death. Read each step of the installation manual carefully before starting the actual
installation.
Always wear safety glasses for eye protection.
Place ignition switch in the OFF position.
Always apply the parking brake when working on a vehicle.
Chock the front and rear tires to prevent unexpected vehicle movement.
If working without a lift, always consult vehicle manual for correct lifting
specifications.
Operate the engine only in well-ventilated areas to avoid exposure to carbon
monoxide.
Do not smoke or use flammable items near or around the fuel system.
Use chemicals and cleaners in well-ventilated areas.
Batteries produce explosive gases, which can cause personal injury. Therefore, do
not allow flames, sparks or flammable substances to come near the battery.
Keep hands and any other objects away from the radiator fan blades.
Keep yourself and your clothing away from moving parts when the engine is
running.

1313-17F957IM-AA 20120803RA Page 4 of 25 1-800-59-ROUSH
Do not wear loose clothing or jewelry that can get caught in rotating parts or scratch
surface finishes.
Allow the engine, cooling system, brakes and exhaust to cool before working on a
vehicle.
WORK SAFELY!
Perform this installation on a good clean level surface for maximum safety and with the
engine turned off.

1313-17F957IM-AA 20120803RA Page 5 of 25 1-800-59-ROUSH
SECTION A –Removal
The following section will guide you through the removal of the factory bumper cover.
1. Open the trunk and remove the two (2) plastic nuts, two (2) pin-type retainers,
release the trunk trim panel, disconnect the trunk light electrical connector and
remove the trunk trim panel.

1313-17F957IM-AA 20120803RA Page 6 of 25 1-800-59-ROUSH
2. Release the side marker harness retainer.
3. Disconnect the LH and RH tail lamp electrical connectors.

1313-17F957IM-AA 20120803RA Page 7 of 25 1-800-59-ROUSH
4. Remove the six (6) 11 mm nuts, push the harness grommets through the body and
remove the LH and RH tail lamps.
5. Remove the six (6) screws and depress the two (2) center clips on the LH and RH
side splash shields to release.

1313-17F957IM-AA 20120803RA Page 8 of 25 1-800-59-ROUSH
6. On the underside of the vehicle, remove and discard the two (2) clips.
7. Remove the four (4) pin-type retainers.

1313-17F957IM-AA 20120803RA Page 9 of 25 1-800-59-ROUSH
8. Remove the two (2) pin-type retainers.
CAUTION: To protect the bottom of the bumper cover from damage, place on a
protective surface once removed.
9. Pull outward on the LH and RH side to release the bumper cover, holding the
center remove the bumper cover.

1313-17F957IM-AA 20120803RA Page 10 of 25 1-800-59-ROUSH
10. Remove the two (2) reflectors and the center trim piece; depress the four (4)
reflector marker tabs and fourteen (14) center trim tabs.
11. Cut out the exhaust area templates provided in the kit (P/N: 1313-17F958TMPL),
tape the template to the bumper cover and mark the area as shown.

1313-17F957IM-AA 20120803RA Page 11 of 25 1-800-59-ROUSH
12. Using a center punch, mark the center of the holes on the template.
13. Remove the template, use a 1/8” drill bit to drill the pilot holes and finish with a 1/4”
drill bit.

1313-17F957IM-AA 20120803RA Page 12 of 25 1-800-59-ROUSH
14. Mark the lines to be slotted on the bumper cover.
15. Using a 1/4” de-burring tool, open the slots marked on the bumper.

1313-17F957IM-AA 20120803RA Page 13 of 25 1-800-59-ROUSH
16. Cut off the area marked on the bumper cover and repeat steps 11-16 for the
opposite side.
17. Cut out the locator/U-Nut template provided in the kit (P/N: 1313-17F958TMPL),
tape the template to the bumper cover.
Using a center punch, mark the the center of the holes on the template.
Cut the 9/16” and the 3/8” holes out of the template and trace the holes to cut
on the bumper cover.
Repeat above steps for the opposite side.

1313-17F957IM-AA 20120803RA Page 14 of 25 1-800-59-ROUSH
18. Drill the pilot holes using a 1/8” drill bit. Drill the 3/8” hole opening using a 3/8” drill
bit and slot the 9/16” holes openings using a 9/16” drill bit.
●Repeat above step for the opposite side.
NOTE: The bottom edge of the template must be flush with the surface edge of the
bumper cover.
19. Cut out the center template provided for the valance panel and tape into position
with the arrow pointing upward.
Using a center punch, mark the the center of the holes on the template.

1313-17F957IM-AA 20120803RA Page 15 of 25 1-800-59-ROUSH
20. Using a 1/8” drill bit, drill the pilot holes and finish with a 1/4” drill bit.
21. Mark the lines to be slotted on the bumper cover.
Using a 1/4” de-burring tool, open the slots marked on the bumper.

1313-17F957IM-AA 20120803RA Page 16 of 25 1-800-59-ROUSH
22. Install the two (2) J-clips (P/N: N623332-S439) in the holes on the bumper cover.
23. Cut out the template for lower LH and RH bumper cover mounts.
Using a center punch, mark the center of the holes on the templates for the LH
and RH bumper cover mounts.

1313-17F957IM-AA 20120803RA Page 17 of 25 1-800-59-ROUSH
24. Drill the pilot holes using a 1/8” drill bit and finish opening the holes with a 3/8” drill
bits on the LH and RH bumper cover mounts.
25. Using alcohol, clean the rear valance and bumper cover mating surfaces. Apply
3M Ad-Pro®(P/N: 021200-27571) to the rear valance where tape will be applied.

1313-17F957IM-AA 20120803RA Page 18 of 25 1-800-59-ROUSH
26. Install the 2-sided tape (P/N: 1313-17F957TAPE) on the back side of the rear
valance as shown.
27. Peel the backing off the 2-sided tape.

1313-17F957IM-AA 20120803RA Page 19 of 25 1-800-59-ROUSH
28. Place the rear valance (P/N: 1313-17F957) on the bumper cover.
29. Install the twelve (12) U-nuts (P/N: 19339B), two (2) W-clips (P/N: W9X14) and two
(2) 8 mm bolts (P/N: R18020057-00) on the back of the valance.
30. Reinstall the two (2) reflector markers.

1313-17F957IM-AA 20120803RA Page 20 of 25 1-800-59-ROUSH
31.Remove sections of the foam bumper cover insert shown for proper fit.