Installing a MAC Dual Exhaust System on a Ford Mustang - AxleAddict - A community of car lovers, enthusiasts, and mechanics sharing our auto advice
Updated date:

Installing a MAC Dual Exhaust System on a Ford Mustang

Author:

Focus, Escort, Mustang; Ford cars Joe has broken and rebuilt in that order. It is an enjoyable never-ending learning cycle . . . sometimes.

Tools You Will Need

 

 

 

18 mm deep socket

Sawzall

Floor jacks

18 mm socket

⅜ inch ratchet

2 jack stands

13 mm socket

½ inch ratchet

4 bricks or wheel chocks

Before You Get Started

Before you can begin installing your new exhaust system, there are a few things you must do in order to work safely.

You must engage the emergency brake and put the transmission in gear. If your vehicle has an automatic transmission, place the car in park and also engage the emergency brake for added safety measures.

Place bricks or wheel chocks in front of and behind each of the front wheels so that your vehicle does rock back and forth and cause and accident.

Finally refer to the image below to find the proper lift points for your vehicle. Once you have done that, lift the car and place a jack stand underneath it, and repeat the same procedure on the other side of the vehicle.

Proper lift points

Proper lift points

Removal Procedure

Locate the Bolts

Once it is safe to look under the car, spot the bolts that are near the Y-pipe. It is a good idea to spray them with lubricant such as WD-40, since more than likely the bolts down there will be rusted (refer to the image below).

Y-pipe bolts

Y-pipe bolts

Loosen the Nut

Loosen and remove the nut using an 18mm socket. Make sure to leave the bolt attached, as you will need it later on when installing the new exhaust.

Remove the Old Exhaust System

You will need to cut the old exhaust system in order to be able to remove it from its original place as it is too big to be removed all in one piece. The cut should be made about two inches from the stock muffler, as shown by the red hash lines on the image below.

installing-mac-dual-exhaust-system-on-a-ford-mustang

Cut the Hangers

Before removing the muffler you will notice that there are rubber mounts attached to the chassis with the hangers that hold your stock muffler in place. Unfortunately, the knob that sticks out of them cannot be removed; therefore you will need to cut the hangers in order to remove your muffler. Do not worry, however; your new exhaust system kit will provide you with new hangers.

Installation Procedure

Attach the Y-Pipes and Muffler Hangers

Slightly bolt in the Y-pipes. Install the muffler hangers from your new exhaust kit in place. Starting with the passenger's side, start to fit the mufflers underneath the car just to get a general idea of the fitment.

Tighten the Hangers

Tighten the hangers to the bottom of the car using a 13mm socket. It is easier to attach the hangers to the muffler first and then attach the muffler itself into the chassis.

installing-mac-dual-exhaust-system-on-a-ford-mustang

Attach the Tail Pipe

Using a 10mm socket, loosely attach the tail pipe to the other end of the muffler so that it lies just outside of the gas tank on the passenger side. This way you can start measuring how far out from your rear bumper that tailpipe will stand.

installing-mac-dual-exhaust-system-on-a-ford-mustang

Position the Drivers' Side Muffler

Place the driver's side muffler assembly up and over the rear axle and loosely attach it to the Y-pipe to check for fitment. With the y-pipe assembly fully put in place it should look something like the image below.

y-pipe fully assembled

y-pipe fully assembled

Attach the Muffler

Tighten the hangers to the bottom of the car using a 13mm socket. It is easier to attach the hangers to the muffler first and then attach the muffler itself into the chassis.

Place the Tail Pipe

Using a 10mm socket, loosely attach the tail pipe to the other end of the muffler so that it lies just outside of the gas tank on the driver's side. This way you can start measuring how far out from your rear bumper that tailpipe will stand.

Tighten Down the Bolts

Once you have everything set in place, and have decided on the final resting place for your tailpipes, it is time to start tightening down all the bolts. It is a good idea to start at the back of the vehicle and work your way up to the front. Make sure to go through everything very thoroughly, so that you do not miss anything, and make sure you tighten everything properly as well.

Do a Final Check

With everything set in place, all there is left to do is to put your vehicle back on the ground and start the engine. Check for any possible leaks along the connecting points of the y-pipes, the mufflers, and the tail pipes. If by any chance you come across one, all you need to do is tighten the bolts a little more and you should be all set.

Final assembly

Final assembly

This article is accurate and true to the best of the author’s knowledge. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters.

Related Articles