Powered by Mustang Enthusiasts - Call Now (866) 507-3786

5.0 Resto Factory Air Box - 1986-93 Mustang | Install & Removal

Last Updated 9/14/2020 by Taylor Ward

Learn how to install & remove your factory air box on your 1986-93 Fox Body Mustang. This is also useful if you are needing to replace your aftermarket cold air intake with a factory style setup.

Viewing this install and using the information shared is subject to the terms set forth here - View the LMR Install Instructions Disclaimer.

FOLLOW: 79 93 mustang , mustang , fox body

5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal

In this article, you’ll see us use our 5.0 Resto airbox, rubber mass air flow meter coupler, mass air meter bracket, inlet tube, and high-flow air filter on a mass air equipped Fox Mustang.

For those of you that own a 1986 to 1988 car and it still has the speed density setup; you’ll just omit the mass air portions from your steps.

Also we have added a quick guide to help you remove your factory air box from your 1986-93 Fox Body Mustang.


Jump To: Install | Removal

Installation


  1. With the aftermarket cold air kit removed, use this opportunity to thoroughly clean the area.
  2. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  3. Once clean, install the two airbox studs and finger tighten.
  4. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  5. Separate the lid from the box and set the lid aside.
  6. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  7. Remove the large, center section of adhesive-backed foam and set it aside.
  8. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  9. Pre-fit the box into place first.
  10. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  11. Now you can remove the adhesive backing and reposition the box into position.
  12. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  13. Press on the inside of the box to fully seat the adhesive-backed foam.
  14. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  15. Install the air filter of your choice. We chose a high-flow filter for this car which is currently available on our site.
  16. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  17. Line up the three tabs on the bottom of the lid with the provisions in the box.
  18. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  19. Verify that the lid is properly aligned and then engage the two upper latches.
  20. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  21. Then you can engage the two latches on the front and rear of the box.
  22. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  23. Back on the bench, remove the silicone couplers from the mass air meter.
  24. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  25. This would also be a great time to thoroughly clean the meter. Check out our video on how you go about doing this.
  26. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  27. Finishing out the video, we’ll be using other 5.0 Resto components to complete our project.
  28. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  29. Lubricate the inside of the rubber coupler with a thin film of dielectric grease. Depress the metal clamp and slide it over the airbox. Position the clamp into place.
  30. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  31. Install the bracket onto the mass air meter in the correct orientation.
  32. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  33. Install the three retaining bolts and snug them down.
  34. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  35. Slide the mass air flow meter into the coupler and align the holes in the bracket with the holes on the strut tower.
  36. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  37. Install the two coarse thread bolts and carefully snug them down.
  38. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  39. Reconnect the mass air flow meter electrical connection.
  40. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  41. Lubricate the inside of the inlet tube with a thin film of dielectric grease.
  42. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  43. Install the inlet tube onto the throttle body and the mass air meter.
  44. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  45. Snug down the hose clamps.
  46. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  47. Go ahead and check over your work; and you’re good to go!


Removal


  1. Starting with the hood open, disconnect the mass airflow electrical connection if equipped.
  2. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  3. Loosen and remove the two mass air bracket to strut tower retaining bolts with a 7/16ths socket or wrench.
  4. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  5. Slide the mass air meter to air box coupler clamp out of position and then loosen the hose clamp that secures the inlet tube to the throttle body.
  6. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  7. Remove this section from the car.
  8. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  9. Loosen and remove the two airbox retaining nuts with a 7/16ths socket.
  10. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal


  11. You can now remove the airbox from the car and you're all done!
  12. 5.0 Resto Factory Air Box Install & Removal - 5.0 Resto Factory Air Box Install & Removal

5.0 Resto Factory Air Box


About the Video

How To Install 50Resto Fox Body Mustang Factory Air Box Kit (86-93)

Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!

Published on 2020-08-07
Buy 86-93 Factory Air Intake Kit: https://latemodelres.to/9600B-K
Factory Air Box: https://latemodelres.to/9600B
Factory Intake Parts: https://latemodelres.to/FactoryIntakeParts

Check out the mentioned videos below!
5.0Resto Factory Air Box Kit Review: https://youtu.be/sQ84mUR75Tk
Fox Body Intake Removal: https://youtu.be/yuuqPlIN0sw
How To Clean MAF Sensor: https://youtu.be/gg7qbznVu2g

Follow along as Landan installs the 5.0Resto factory air box kit for 1986-1993 Fox Body Mustangs.

YouTube: https://latemodelres.to/youtube-subscribe
Facebook: http://www.facebook.com/latemodelresto
Instagram: http://instagram.com/latemodelresto
Twitter: http://twitter.com/latemodelresto

#LMR #50Resto #FoxBody

Due to factors beyond the control of LMR.com, we cannot guarantee against the improper use or unauthorized modifications of this information. LMR.com assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. LMR.com recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of LMR.com, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not LMR.com.