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1979-93 Fox Body Mustang Midpipe Installation Instructions

If you are looking for an aggressive sound paired with more HP & TQ, look no further than an updated mid-pipe for your 1979-1993 Fox Body Mustang. This quick and easy installation guide will show you how to get more horsepower & torque out of your 1979-93 Mustang!

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 , exhaust

Tools Needed:

  • Hacksaw or Sawsall
  • Common House Hold Tools Set
  • Welder(See Disclaimer)
  • Penetrating oil
  • Jack and Jack Stands

Installation Instructions:


Step 1:
Begin by disconnecting your negative cable from your battery, as you will be disconnecting some electrical components. Place the vehicle on a lift or (4) jack stands at maximum height. This will aid in an easier installation. Note: Make sure to support your catback just past the connection point between the factory h-pipe.
How To Install A Fox Body Mid Pipe  - How To Install A Fox Body Mid Pipe

Step 2:
Unbolt the factory h-pipe from your cat-back. Soaking your factory mounting points with penetrating oil will allow for easier removal. Next, disconnect your 02 sensors from the factory wiring harness and remove them from the h-pipe using a 22mm wrench. Remove the bolts at the manifold/header end. Be careful, as old or rusty parts tend to break easily.
How To Install A Fox Body Mid Pipe  - How To Install A Fox Body Mid Pipe

Step 3:
Begin by installing the driver and passenger side down-pipes/front legs, snug the bolts but do not tighten.
How To Install A Fox Body Mid Pipe  - How To Install A Fox Body Mid Pipe

Step 4:
Next, install the x-pipe or h-pipe portion. Position the ball portion so that the long leg is on the driver side and the short leg is on the passenger side. Slide the (2) band clamps (if equipped) on to the front legs of the x-pipe/h-pipe.
How To Install A Fox Body Mid Pipe  - How To Install A Fox Body Mid Pipe

Step 5:
Now, slide the x/h-pipe on to the driver and passenger down-pipes matching the ball ends to the cat-back. Re-install the factory cat-back hardware and snug tight.
How To Install A Fox Body Mid Pipe  - How To Install A Fox Body Mid Pipe

Step 6:
Supporting or jacking up on the center of the x/h-pipe will aid in the system having the most possible ground clearance. Finish by tightening all the hardware.
How To Install A Fox Body Mid Pipe  - How To Install A Fox Body Mid Pipe

Step 7:
After all the connections are tight, Reconnect both O2 sensors, Lower the car, and reconnect the battery. Start the engine and listen for any leaks. Make sure to check your torque on all connections periodically as they may come loose after heat cycles.

Tip:
For a cleaner appearance and more secure installation, we highly recommend welding all slip-fit connections if equipped. Ball and socket flange connections will not require this step. If you live in a geographical area that has harsh winters or see a great deal of precipitation, the use of high-temperature paint over the welded areas can help to prevent surface rust and premature corrosion.

Disclaimer:

Not all exhaust systems will require welding. However, we recommend reading over the supplied instructions in your mid-pipe exhaust kit purchased from LMR. This will ensure proper installation of your Fox Body Mustang x pipe or h pipe exhaust.

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