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.
- With the aftermarket cold air kit removed, use this opportunity to thoroughly clean the area.
- Once clean, install the two airbox studs and finger tighten.
- Separate the lid from the box and set the lid aside.
- Remove the large, center section of adhesive-backed foam and set it aside.
- Pre-fit the box into place first.
- Now you can remove the adhesive backing and reposition the box into position.
- Press on the inside of the box to fully seat the adhesive-backed foam.
- Install the air filter of your choice. We chose a high-flow filter for this car which is currently available on our site.
- Line up the three tabs on the bottom of the lid with the provisions in the box.
- Verify that the lid is properly aligned and then engage the two upper latches.
- Then you can engage the two latches on the front and rear of the box.
- Back on the bench, remove the silicone couplers from the mass air meter.
- This would also be a great time to thoroughly clean the meter. Check out our video on how you go about doing this.
- Finishing out the video, we’ll be using other 5.0 Resto components to complete our project.
- 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.
- Install the bracket onto the mass air meter in the correct orientation.
- Install the three retaining bolts and snug them down.
- Slide the mass air flow meter into the coupler and align the holes in the bracket with the holes on the strut tower.
- Install the two coarse thread bolts and carefully snug them down.
- Reconnect the mass air flow meter electrical connection.
- Lubricate the inside of the inlet tube with a thin film of dielectric grease.
- Install the inlet tube onto the throttle body and the mass air meter.
- Snug down the hose clamps.
- Go ahead and check over your work; and you’re good to go!
- Starting with the hood open, disconnect the mass airflow electrical connection if equipped.
- Loosen and remove the two mass air bracket to strut tower retaining bolts with a 7/16ths socket or wrench.
- 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.
- Remove this section from the car.
- Loosen and remove the two airbox retaining nuts with a 7/16ths socket.
- You can now remove the airbox from the car and you're all done!