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

Mustang Cat-back Exhaust System Installation Instructions (15-18)

Created by Tyler Rodriquez
Last Updated 2/15/2018

Installing a cat-back exhaust on your 15-18 Mustang can be a major upgrade to performance, sound and HP/TQ gains. Even though all kits are not the same, we are here to show the proper way to get your kit installed in a timely manner. For more detailed instructions regarding a specific exhaust kit, please refer to the manufactures instructions.

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

FOLLOW: 2015 mustang , mustang , exhaust

How to Install a Cat-back System on your S550 Mustang

Tools Needed:

  • Ratchet Set
  • Floor Jack
  • Basic Tools

Removal Instructions

  1. Remove the exhaust hangers closest to the back w/ a 13mm deep socket. Then rotate the end of the hanger downwards.

  2. Mustang Cat-back Exhaust System Install

  3. Loosen (2) factory band clamps on the front factory mid-muffler.

  4. Mustang Cat-back Exhaust System Install

  5. Locate and loosen the two exhaust hangers just above the muffler tips.

  6. Mustang Cat-back Exhaust System Install

  7. Repeat Step 3 to the other side.

  8. With help, carefully remove the exhaust from the car.

  9. Mustang Cat-back Exhaust System Install

  10. Once the exhaust is removed, use an exhaust hanger removal tool(purchasable at most auto stores) to remove the hangers and transfer them to the new exhaust.

  11. Mustang Cat-back Exhaust System Install

  12. Carefully remove the two exhaust clamps using a rubber mallet. Slide them onto your new exhaust pipe.

  13. Mustang Cat-back Exhaust System Install

Aftermarket Exhaust System Installation Instructions

  1. Start by installing the muffler section of the exhaust with help from a friend. Put the hanger closest to the muffler tip first, then the hanger closest to the rear end center section.

  2. Mustang Cat-back Exhaust System Install

  3. Slide the (2) included clamps on the X-Pipe.

  4. Mustang Cat-back Exhaust System Install

  5. At the front of the included X-Pipe, slide the exhaust clamp towards the factory exhaust. Snug the bolts down, but not all the way.

  6. Mustang Cat-back Exhaust System Install

  7. Firmly tighten down the four bolts on the clamps.

  8. Mustang Cat-back Exhaust System Install

  9. Next, tighten down the exhaust clamps in front of the X-Pipes.

  10. Mustang Cat-back Exhaust System Install

  11. Have a friend apply pressure to the rear or axelback portion and tighten down the (4) hangers.

  12. Mustang Cat-back Exhaust System Install

  13. Check that you've tightened all of the clamps on your new exhaust beginning at the X-Pipe and moving to the Rear Mufflers. Once position has been determined to be correct, tighten the Accuseal clamps to 32-35 ft. lbs. making sure the clamp bolts are centered between the notches in the pipe.

  14. Before starting your vehicle, make sure to check all wires, hoses, brake lines, body parts and tires for safe clearance from the exhaust system.

  15. Start vehicle and check for any leaks. If any leaks are found, determine cause (such as loose or incorrectly positioned clamp) and repair as necessary.

Popular 2015-16 Mustang Catbacks

About the Video

Mustang GT Gibson Catback Exhaust Install (2015-2016 5.0L)

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 2014-11-02
In this video, we show you how simple installing a Gibson Catback exhaust kit for your 2015 5.0 Mustang really is!

Both 2015 Mustang Gibson exhaust kits are made from mandrel bent, 3" stainless steel tubing for increased exhaust flow which improves power and torque. It features an x pipe and Superflow mufflers to help get maximum performance. It is finished of with 4.5" polished intercooled tips to give the rear of your S550 an aggressive new look.

latemodelrestoration.com SVE Performance 5.0 Resto

Dyno Video: