How To Make Mustang Quieter


While Mustangs are known for being powerful, fast vehicles that can be expensive to own, one of their weaker points is vehicle noise. When you take your car out, especially during winter or early spring when snow and rain are in the forecast, listening for other cars, planes, and street noises makes making it easy to determine if you should stay or go very difficult.

If you have to make a quick getaway because something has gone wrong, you will want to know how quiet or loud the area is so you do not have to worry about someone hearing an important conversation or an ambulance coming down the road. Similarly, if you do not feel like driving due to the weather, you will need to know whether there are alternatives such as buses, trains, or taxis.

There are several things you can do to reduce the sound level of your Mustang slightly, including replacing the current engine muffler system with ones that are designed to produce less exhaust gas.

Seal up all the cracks and gaps in your engine

how to make mustang quieter

One of the biggest sources of noise for Mustangs is the intake and exhaust systems. These are the tubes that take air into and out of the car through an open system, or as they are sometimes called — pipes!

When you’re driving down the road, there can be a lot of turbulence coming off the vehicle. This causes drag, which requires more fuel to move the same amount of air. The extra fuel comes from pumping it out of the tank, so the engine has to work harder.

This added resistance creates more friction, which burns more gas. Because this process is repeated over and over, it adds up very quickly.

Sealing these areas helps reduce the efficiency of the engine, creating more noise and wasting gasoline. A good way to do this is by replacing the gaskets in them.

Use a sound-dampening pully

how to make mustang quieter

Aftermarket performance modifications for cars often include noise attenuating features, such as engine cover covers or plastic panels that are attached to the car with bolts or screws.

These additions reduce air drag which in turn reduces overall vehicle resistance and thus increases speed. Similarly, acoustic foam can be used under the hood or behind the wheel to help diminish interior noise.

By adding these quiet treatments to your mustang, you’ll also be reducing road roar and buffeting sounds that could potentially scare other drivers!

You may also want to check out our article about tips for improving fuel economy.

Replace your exhaust tips

how to make mustang quieter

The first step towards making your Mustang quieter is replacing its existing muffler or gutter system with ones that are better designed. If you have a straight pipe design, you can get very expensive aftermarket systems that do not require any cuts in the pipe!

The easiest way to reduce backpressure is to use shorter length pipes or “open-pipe” designs where there is no restriction at all. This will create less turbulence which helps suppress engine noise slightly!

However, if you really want to make a difference you need to upgrade your piping to be more efficient. More closed channels mean lower back pressure, and thusly reduced engine drone.

There are several companies that produce quality performance stainless steel exhaust systems for Mustangs. Because they are made of stronger material than normal aluminum products, they are able to run larger diameter headers and/or longer lengths which help compensate for their increased weight.

Overall, look up your local dealers and see what types of upgrades they have.

Replace your suspension

how to make mustang quieter

The first step in making your Mustang quieter is replacing its current suspension. You can go all-wheel drive or stick with regular front or rear wheel travel, but make sure you are looking into each system before buying!

All-wheel drive will reduce weight transfer from one side of the car to the other, reducing noise that comes from vibration and fluctuation in pressure. If you’re looking to keep it simple, just buy yourself some aftermarket sway bars!

For those who love a bit more offroad ability, look into coilovers or air suspensions. These are usually costlier than stock springs and shocks, however. Don’t worry about going too expensive as most companies have excellent customer service.

If you want even more silence, look into lowering your vehicle! This can be done through wheels and tires down at least 1″, more if possible, engine replacement, and overall less powerful brakes and engines.

Change your oil

how to make mustang quieter

Changing your engine’s oil is one of the most important maintenance tasks you will do for your vehicle. A dirty engine oil can contribute to excessive noise that comes from friction as the engine moves through each gear, or it could even be the cause of overheated brakes or wheels!

If you are ever unsure what kind of oil to use in your car, ask someone at your local dealership or go online to find out. They should be able to help you pick something appropriate for your make and model.

You don’t want to buy an expensive brand name oil with fancy packaging unless you know how to change it yourself! There are many sites where you can learn how to do this, so check those out too.

Flush and replace your cooling system

how to make mustang quieter

The first step in making your Mustang quieter is flushing and replacing its current coolant and gasket material. You can find information on how to do this here.

Once you have done that, it’s time to pick your top choice for either cold-weather or hot-temperature safe liquid metal. Liquid metals are all around more expensive than regular coolants, but they will last much longer due to their thicker protective coating. Because these cars usually use around 2 gallons of coolant per every 100 miles, it adds up quickly!

We recommend General Fabrication Products Liquid Metal Cooling System Kits because not only does it include everything needed to install the new coolant, but also uses OEM compatible fluids which help keep the car warranty intact. These kits cost about $40-$50 extra to buy them separately, but are well worth it!

General fabrication products also offers easy access to both radiator hose clamps, as well as dip sticks (for looking under the vehicle to check fluid levels). This helps make changing the coolant easier since you don’t need to remove any parts before adding the new one.

Install a sound-dampening pully in your engine

After you have checked and made sure that your wheels are tight, next is to check your belt placement! If possible, have someone help you with this by placing their hand under your hood while you tighten them up.

This will make it much easier to see if there is any slack or looseness in the belts. A good way to do this is to place one hand on top of the other, both hands just underneath the hood. Once they can no longer feel movement, then re-tighten the belts.

Also, be careful not to over-tighten the belts as this could cause damage to the engine! Only use the proper amount of force when tightening so that you know what you are working with!

By having a second person help, they can also tell you if your car is hot or cold. If it’s warm outside, then your vehicle may need additional air intake, which we will discuss later. However, if it’s very chilly out, then your vehicle needs more radiator heat, which we will talk about soon.

Get an aftermarket exhaust system

how to make mustang quieter

The first step towards quieter driving is getting rid of your current muffler or replacing it with one that has more open channels for air to exit. There are many companies that offer all-aluminum, titanium, or carbon fiber pipe systems to fit into various size engines.

These systems have larger openings than normal stainless steel pipes and better balance acoustics because they do not close off as much of the engine’s airflow. A well engineered system will also include sound deadening components like tubes or resonators that reduce resonance frequencies when the vehicle is moving and idleing.

Some brands add separate chambers at each bend in the pipe so that any noise that makes its way through there does not resonate and reverb loudly. This cuts down on the “ringing” you may hear from the pipe when it vibrates from back pressure.

You can find vendors who cater specifically to Mustangs online.

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