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2005-09 Mustang Axle Back Exhaust Installation Instructions

Created by Taylor Ward
Last Updated 5/17/2021

Quickly, and easily change up the tone of your S197 with a new set of axel backs!

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

FOLLOW: 05 09 mustang , mustang , axle back , exhaust

Tools Required

  • 15mm Socket
  • 13mm Socket

Installation Instructions

Step 1:
Use a 15mm socket to loosen the nuts on the clamped connection between the mufflers, and the over-axel pipe

Step 2:
Use a 13mm socket to remove the bolts that secure the muffler hangers to the frame of the vehicle

Step 3:
Remove the 2 hangers on each side of the vehicle to allow removal of the stock mufflers

Step 4:
Slide the muffler off of the over-axle pipe, and set the muffler aside

Step 5:
Take the hanger mounts off of the stock muffler and put them on to your new mufflers

Step 6:
Prep the new clamps supplied in the hardware kit by removing the nuts and applying a thick lubricant such as white grease or anti-seize to the threads

Step 7:
Place one of the supplied clamps on to the inlet pipe of the right muffler

Step 8:
Slide the muffler on to the over-axle pipe, and support it with a stand

Step 9:
Place the hanger mounts back in to position on the frame and reinstall the factory bolts

Step 10:
A 13mm open end wrench will be needed to reach the bolts above the muffler

Step 11:
Level the muffler and tighten the clamp on the muffler inlet enough to hold, but still allow for adjustment (repeat the step for the left muffler)

Step 12:
Adjust the position of the muffler to provide a satisfactory fit (a minimum of 1/2" clearance around all parts of the system must be maintained; while keeping travel and vibration in mind.

Step 13:
After adjustments have been made, securely tighten all clamps

Installation instructions provided by Flowmaster Exhaust