2013-14 Mustang Boss 302 Rear Diffuser Installation Instructions
Created by Phillip Perez
Date Created: 12/15/2016
Last Updated: 5/17/2021
Add an aggressive touch to the rear end of your 2013-14 Mustang with this OE Ford Boss 302 rear diffuser!
FOLLOW:
10 14 mustang
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mustang
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boss 302
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diffuser
Tools Required:
- Air Powered Body Saw
- Phillips Head
- 11mm Socket
- Flat Head Screw Driver
Installation Instructions
- Open the trunk, and remove the 2 plastic nuts, and the 2 pushpin type retainers
- Release the trunk trim panel, and disconnect the trunk light electrical connector, and then remove the trunk trim panel
- Disconnect the right, and left hand tail lamp electrical connectors
- Remove the 3 retaining nuts per tail light, and push the harness grommets through the body, and remove both the left hand, and right hand tail lamps
- Raise, and support the rear end of the Mustang with jack stands
- Remove the 3 screws on each side in the wheel well opening at the front of the rear bumper
- Release the center clips on both the left, and right hand splash shield
- From under the car, remove the 2 retaining clips
- Remove the 4 pin type retainers, two per side
- Remove the pin type retainers from each retaining arm
- Pull outward on the left hand, and the right hand side of the bumper to release it from the body, and then fully remove the rear bumper cover
- Lay the bumper cover face down on some shop towels to prevent scratching the paint surface, and remove the two reflectors, and the center trim piece by depressing the retaining tabs
- The inside of the bumper cover has a very fine line etched all along the lower portion of the bumper cover where you need to trim
- Note: It's always recommended to cut slightly below the line to allow for slight movement of your hand while cutting Use your air powered body saw to trim the lower portion of your rear bumper cover from one exhaust outlet, to the other
- Next, above each exhaust outlet, there are 2 (per side) etched in slots where you'll need to drill a hole at the end of each slot
- Use your body saw to finish cutting the slots until you have an even open line where each slot was etched into the bumper
- Now just clip in your Boss 302 rear diffuser into your factory bumper cover with the supplied hardware
- Reinstall your rear bumper cover, your tail lamps, double check all electrical connections, and you're all done!
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$214.99

Add a different look to the rear of your 2013-2014 Mustang with a Boss 302 rear valance/diffuser. This is the same Rear Diffuser/Valance that is factory equipment on the 2013 Mustang Boss 302 & California Special. It features a black textu
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