Best Exhaust Systems for GMC Sierra

Many auto enthusiasts have no idea how essential their vehicle’s exhaust system is to the trouble-free operation of the powertrain. Without paying due attention to maintenance, poor exhaust system conditions can result in engine failure. For this reason, it is worth getting familiar with the operating principles of the exhaust system, its design features, and the components.

A List of Top-Rated Exhaust Systems and Pipes for GMC Sierra

Image	Product
Best Cat-back Exhaust System	Flowmaster 817689 Stainless steel construction Extremely deep and aggressive exterior/interior sound Large 4" black ceramic coated tips Lifetime warranty Easy installation Check Price	Check Price
Best Value	Borla 140537 Single round rolled angle-cut tip Truck single split rear exit Additional power Driving excitement Ultra-smooth mandrel bends Check Price	Check Price
Best Cat-Back Systems for GMC Sierra	Flowmaster 817669 Aggressive exterior and descent interior tone Super 40 Series performance muffler Delta flow technology Custom-fit Easy installation Check Price	Check Price
Exhaust System with Single Side Exit	MagnaFlow 15267 Performance gains in HP and torque Deep MagnaFlow performance sound Moderate exterior sound Mild interior sound Easy bolt-on installation Check Price	Check Price
Also Great	BORLA 140546 Truck split side exit Made in the USA All T-304 stainless steel construction Cat-back exhaust system Tip shape - single round rolled angle-cut Check Price	Check Price
Best American Thunder Exhaust System	MagnaFlow 15270 Dyno-tested and proven for improved performance Boosted HP and torque Truly aggressive deep Magnaflow tone Optimized weight Dyno proven performance Check Price	Check Price
Premium Stainless Steel Construction	CORSA 14866 Great strong and throaty sound Easy to install Perfect fit Increased fuel efficiency Clamp-On tip design Check Price	Check Price
Maximum Exhaust Gas Flow	PYPES EXHAUST SGT29V Outstanding aggressive sound Great appearance Amazing price/quality ratio Fuel efficiency Easy installation with bolt-tightening clamps Check Price	Check Price

An important role in the work of the internal combustion engine is the timely release of exhaust gases which begin to accumulate in the combustion chamber of the cylinder head immediately after the ignition of the fuel mixture. This task is performed by exhaust systems or mufflers which are used in all modern vehicles.

The proper operation of the exhaust system is aimed at removing the remnants of the used fuel mixture from the engine and depends entirely on the serviceability of all its components which have some structural differences, depending on the engine type.

Components and Structural Differences

Diesel Exhaust System Features

It is no secret that vehicles equipped with diesel engines are becoming more popular every year. The demand is growing not only for commercial vehicles but also for passenger cars with diesel engines. It is hardly surprising because vehicles equipped with diesel engines have some undeniable advantages over those that use gasoline, such as high torque, power, efficiency, and durability.

But since the structure of such engines is very different from that of gasoline models, the diesel exhaust system construction also has its differences. Let’s look at some of these different features in more detail.

Diesel Particulate Filter

Let’s start with the main difference. In modern exhaust systems of diesel cars, there should be a diesel particulate filter (DPF[note]https://digitalcommons.unl.edu/dissertations/AAI3236910/[/note]), which is analogous to the catalyst in cars that run on petrol.

By its internal structure, the particulate filter consists of small channels, the so-called “honeycomb”, through which exhaust gases from the engine pass. As it passes through the honeycomb, the exhaust gases are cleared of soot, which simply settles in the filter ducts and is then discharged further down the exhaust pipework.

The DPF is quite “capricious” in maintenance and not cheap by any means. During the cleaning of the exhaust fumes, the filter becomes clogged. To clean it, there is a process called “regeneration” which is when the central control unit of the diesel engine supplies fuel so that it burns out in the exhaust system.

When exposed to high temperatures, the soot simply burns out, and the filter becomes clean. The regeneration process is always accompanied by increased smoking in the exhaust system and lasts about 5 minutes on average.

But the problem is that in reality, the process of regeneration is not always successful. It often happens that all the soot just does not have time to burn out, and sooner or later the diesel exhaust filter gets clogged. In the initial stages of contamination, the filter can be washed, but when it is heavily contaminated, only replacement with a new filter will help.

Vibration: Diesel Exhaust’s Main Enemy

Diesel engines generate much more vibration than petrol engines, so it is crucial to pay attention to the condition and quality of the exhaust system corrugated pipe. As you know, the main purpose of the pipe is to prevent the transmission of vibrations from the engine to the exhaust system, and in the case of diesel engines, it is extremely important.

In general, the exhaust systems of vehicles with diesel and gasoline engines are similar, although not identical. Ironically, diesel exhaust systems are much less prone to burnout because the heat transfer temperature during the combustion process is lower than that of gasoline systems. Also, the sound of diesel exhaust is quieter than that of gasoline engines and is sufficient for the tuning process.

If you own a vehicle with a diesel engine and want the exhaust system to last for a long time, one of the main routine things to do is to check the corrugated pipe condition periodically and always bring the regeneration process to an end (once started, there is no need to stop the engine). This way, your diesel system will run for a long time without repairs.

Many people think that there is no way to get a beautiful sound from a diesel exhaust system. That’s not true. A real expert knows that you can always choose components that will help create a beautiful sound, even in a diesel vehicle!

Diesel exhaust parameters can be brought to perfection by you or a workshop technician. In addition, if that’s not enough, you can always set the Active Sound of the exhaust system. And the main thing is that tuning the diesel exhaust system can achieve more significant results in terms of power increases. In some cases, tuning the exhaust system can give up to 15-25% additional power!
[best_choice amz_url=”https://www.amazon.com/dp/B00FTTW0VY/?tag=cartime0e-20″ img_url=”https://images-na.ssl-images-amazon.com/images/I/517M6hHJXML._AC_SL1500_.jpg” best_name=”MBRP S5080AL” sub_name=”Best Exhaust Systems for GMC Sierra” best_text=”The MBRP’s 3 in. S5080AL offers a perfect sound and easy installation.”]

When it comes to a diesel engine, experts use specialized equipment and calculate the project to create an exhaust system that matches the parameters of the internal elements of the vehicle. Repairs and tuning of exhaust systems on diesel engines do not differ much from petrol systems, but there are differences and unique features, requiring a professional approach.

Below is the list of the best exhaust systems for the GMC Sierra. Feel free to choose the one that will match your style and preferences.

The Best Exhaust Systems for GMC Sierra

• MBRP S5080AL
  (Best Exhaust Systems for GMC Sierra)
• Flowmaster 817689
  (Best Cat-Back Exhaust System)
• Borla 140537
  (Best Value Exhaust for Sierra)
• Flowmaster 817669
  (Top-Rated Cat-Back System for GMC Sierra)
• MagnaFlow 15267
  (Top Exhaust System with Single Side Exit)
• Borla 140546
  (Best Dual Exhaust System for GMC Sierra)
• MagnaFlow 15270
  (GMC Sierra Exhaust System)
• CORSA 14866
  (GMC Sierra 1500 Exhaust System)
• Pypes Exhaust SGT29V
  (Exhaust System for 2010-2018 GMC Sierra 1500 5.3 4WD)

1. MBRP S5080AL – Best Exhaust Systems for GMC Sierra

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This welded unit is built to last for years, providing exceptional quality in areas with moderate environmental conditions. This well-crafted gas exhaust system[note]https://www.carthrottle.com/post/engineering-explained-exhaust-systems-and-how-to-increase-performance/[/note] is made of 16-gauge aluminized steel and comes with hangers and a 4″ OD tip.

A great example of solid experience, it represents the Installer Series and provides the same high-quality design and craftsmanship as other MBRP systems as well as an amazing price/quality ratio. The product is backed by a 3-year warranty.

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2. Flowmaster 817689 – Best Cat-Back Exhaust System

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The second exhaust system on the menu is from Flowmaster. This custom-designed Outlaw Series cat-back exhaust system is built for the 2014-2019 GMC Sierra 1500 trucks (Classic body) with a 5.3L engine. The unit is a great improvement if you want your truck to sound satisfyingly aggressive from both the outside and the inside.

This system provides all of the performance benefits that you’d expect from a reliable manufacturer. The bolt-on, emissions-legal system offers variable tailpipe exits – either dual out the rear under the bumper, or dual out the sides behind the rear tires.

Other features include stainless steel mandrel-bent tubing that flows smoothly into a Super 10 series muffler and exits with dual 3″ stainless steel mandrel-bent tailpipes. The system uses the stock hanger locations and is finished off with a pair of large 4″ black ceramic-coated stainless steel tips.

This high-quality product is backed by a lifetime warranty. You will have absolutely no problems with the installation since the system was designed for an easy fit, including all necessary parts and hardware for making installation a snap.

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3. Borla 140537 – Best Value Exhaust for Sierra

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Borla’s exhaust system with cat-back technology is designed to release hidden horsepower of your GMC Sierra with no drone in any gear, speed, or RPM. This unit offers increased exhaust velocity with extra power, driving smoothness, and fuel economy in 5.3L GM trucks.

The unique and deep Borla sound is truly pleasant to your ears and respected by auto enthusiasts all over the world. Each Borla system is built from premium T-304 stainless steel, which is superior to T-400 series knockoffs, to provide the best possible performance and durability.

Smooth mandrel bends provide maximum gas flow and power to your truck, and the precision construction makes for an exact fit. Lastly, the manufacturer stands behind every product with a Million-Mile warranty. You have everything that you’d expect from the world’s winning exhaust brand.

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4. Flowmaster 817669 – Top-Rated Cat-Back System for GMC Sierra

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This exhaust system from Flowmaster is designed for 14-19 Sierra 1500 trucks and is perfect for those looking for a moderate interior sound and aggressive exterior tone. Flowmaster exceeds your expectations! The American Thunder Series cat-back exhaust system is fully bolt-on and emissions-legal just like the one above from the same manufacturer.

You can choose your tailpipe exit type – dual out the rear under the bumper or dual out the sides behind the rear tires.

The system features include stainless steel mandrel-bent tubing that flows into a Super 40 series muffler, exiting with dual 2.50″ stainless steel mandrel-bent tailpipes. The system uses the factory hanger locations and is finished off with a pair of large 3.5″ polished stainless steel tips.

Built to last for years and offering an easy fit, this exhaust system includes all the hardware and necessary parts for proper installation and is covered by a lifetime warranty.

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5. MagnaFlow 15267 – Top Exhaust System with Single Side Exit

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If you are looking for the right exhaust system to boost the performance and sound of your GMC Sierra, you may find yourself with a challenge on your hands. But MagnaFlow eliminates all the difficulties, offering its high-quality polished stainless steel Cat-Back Street Series exhaust system. Once you hear the sound this 3″ exhaust provides, the right choice becomes obvious.

The system guarantees no drone and comes with polished 4″ round stainless steel tips (12″ long), a straight-through stainless steel polished muffler, and easy bolt-on installation. The construction represents the finest CNC precision robotic manufacturing with optimized weight and dyno-proven performance.

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6. Borla 140546 – Best Dual Exhaust System for GMC Sierra

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Borla has so many solid sleek exhaust system options! This one is another dyno-tested high-quality model with a different style of exit (truck split side).

The cat-back and axle-back multi-core technology of this 3″ exhaust system really deliver – the unit is designed to get more horsepower from your GMC[note]https://en.wikipedia.org/wiki/GMC_(automobile)[/note] truck, adding driving smoothness, diesel fuel economy, and providing an even deeper powerful sound. The 140546 offers a more aggressive tone compared to the 140537.

Should we remind you that each Borla system is built from premium T-304 stainless steel to provide ultimate performance and a longer lifespan of the system? The smooth mandrel bends of the unit ensure maximum gas flow, while precision computer-controlled CNC manufacturing provides a perfect fit and durability.

Borla stands behind each of their systems, proving their quality with a Million-Mile warranty. And that’s exactly what you deserve when dealing with a reliable manufacturer with years of experience.

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7. MagnaFlow 15270 – GMC Sierra Exhaust System

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This 3″ Cat-Back Street Series exhaust system is perhaps one of the most aggressive sounding models on the list. Designed by MagnaFlow and using the latest technologies, it’s simply a beast! The sound is dramatic and rated “Very Aggressive” and “Aggressive” for exterior and interior tones, respectively, on the manufacturer’s website.

The installation of this stainless steel polished exhaust system with double-wall welded angle-cut round tips is just as easy as with the previous model from this manufacturer. However, basic automotive knowledge for proper installation is always a must-have, and MagnaFlow recommends professional installation for a perfect result.

The system also features a straight-through stainless steel polished muffler.

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8. CORSA 14866 – GMC Sierra 1500 Exhaust System

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A new player has loudly entered the game! CORSA Sport exhaust systems represent a straight-through, non-restrictive, high-quality design. Their exhausts are coupled with patented reflective sound-cancellation technology to eliminate annoying low frequencies that cause droning, replacing it with clean sound.

With such technologies, the backpressure is reduced, allowing your engine to produce more HP and torque. The robust, aggressive-sounding CORSA Sport exhaust systems are made of premium stainless steel material with mandrel bends and handcrafted tips polished to blinding brightness to highlight your truck’s new style.

Developed to fit just right, CORSA exhaust systems need no cutting or welding. Bold or quiet, they can be whichever whenever you need them to be.

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9. Pypes Exhaust SGT29V – Exhaust System for 2010-2018 GMC Sierra 1500 5.3 4WD

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Pypes Exhaust Systems are built to deliver ultimate performance and outflow factory exhausts. This particular system features mandrel-bent, 16-gauge stainless steel piping and a precision-matched stainless steel Violator muffler to provide an extra boost for speedy lane changes and to improve fuel economy.

Fabricated using the highest quality materials, this smoothly constructed system offers maximum exhaust gas flow, which can significantly improve HP. The SGT29V muffler material resists corrosion and extends the life of the entire exhaust system. The muffler is precision matched to bring an outstanding aggressive sound and unmatchable performance.

The exhaust system comes complete with dual-exit tailpipes, 3.5″ rolled edge 304 stainless tips, cad-plated UniClamps, and steel hangers. It can be installed without any special tools since all the necessary hardware is included. It can be a great replacement to improve flow and style and make your vehicle’s sound outstanding on the road.

And all this comes at an affordable price, without sacrificing quality.

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Exhaust System Operation Principles

A modern exhaust system consists of several parts, unlike the older initial devices in the form of a mechanical valve manually opened by the driver. All parts of an exhaust system, connected by mounting bolts through the flanges at their ends, are designed for:

• Removing exhaust gas and other unburned fuel mixture residues from the engine combustion chamber;
• Reducing noise emitted by the engine during operation;
• Reducing the number of toxic substances in the vehicle exhaust;
• Preventing toxic gases from entering the interior of the vehicle.

An exhaust system has a rather simple operation principle which implies exhaust gas extraction from the combustion chamber, leading it to the rear of the vehicle through piping, while reducing the noise emitted by the engine due to tightness of the whole structure and connections through flanges with heat-resistant seals.

The reduction of toxic substances in the exhaust gas is achieved through the use of catalytic converters (catalysts) in the design of the exhaust system, the performance of which is controlled by an oxygen sensor. In modern diesel vehicles, to improve the environmental performance of the exhaust, manufacturers use the DPF which also comes with the diesel exhaust system.

Quite often, a turbocharger is used in the design of a diesel engine as well as a modern gasoline unit. Turbochargers use an air mixture of oxygen and exhaust gases taken from the exhaust manifold to supply the combustion chamber. The amount of exhaust gases entering the turbine is regulated by a sensor located on the exhaust manifold housing.

Tuning of the exhaust system allows for an increase in the capacity of the vehicle from 5% to 18%, and in some diesel engine cases, the increase can even reach up to a fantastic 25%! It can also help extend the life of the engine because an additional advantage of refining the system is considered to be a lighter engine run and reduced stress.

And for you, it’s a change in the aesthetic and sound characteristics of the exhaust system, both at idling speed and when driving. In general, the work on improving the exhaust is subdivided into:

• Audio tuning (changing the sound of the engine);
• Visual tuning (change in visual characteristics);
• Technical tuning (increase in productivity of the car).

Pros and Cons of Exhaust Tuning

The pros include the following points:

Power. Typically you’ll get an increase in power from 3% up to 18%, but in some rare cases it can reach 20-25%. If you want to add power and torque to your big bad truck, tuning the exhaust system with a focus on performance is just what you need. It’s an easy way to boost power without changing the engine’s factory specifications and settings.

An additional bonus feature is that when you increase the engine power, there is usually a reduction in fuel consumption during city driving. This effect is made possible by reducing the amount of barriers and resistance in the exhaust path and reducing the resistance to engine operation.

Resonators, stock catalysts, and mufflers – all these can become obstacles to effective exhaust emissions. Sports catalysts, direct-flow mufflers, and direct-flow resonators reduce resistance and facilitate engine operation.

When trying to increase engine power on their own, many amateur mechanics face adverse effects and sometimes experience breakage of expensive elements or even damage engine components. Exhaust system tuning is not simple – the collector must be perfectly put together with the downpipe (and all the pipework) having the required geometry and bending angles.

Each element must have the required capacity at a certain pressure and temperature of the exhaust gas. And with bends, turbulence appears. With poor exhaust system tuning, vehicles burn, and that’s wrong.

To create a quality exhaust system, a high level of qualification in installation and design is required. These factors ensure a balanced level of power, sound, weight, and visual characteristics. Experts of reliable car service will help solve problems of any complexity, make all calculations, and do the beneficial work without causing any harm to the vehicle.

Engine safety. Competent tuning of the exhaust removes excess stress on the engine. As a result, the engine lasts longer, and you also get better fuel economy.

Sound. That’s the sound of the exhaust system that you want to hear every day! If you need it loud today, it’ll be loud. If you need silence, you will get it when you want. And all those changes can be done by pushing a control button or from your smartphone.

Some vehicle owners need an aggressive roar, others need a silent all-terrain vehicle for fishing and hunting – everyone has their own wishes.

Most drivers have at least once encountered the unpleasant sounds of crackling, knocking, or abrupt exhaust while driving. Experts will find the reason for the sound change, effectively “healing” your car.

In addition, quality workshops offer improving your exhaust system, which will provide a light growling or a quiet soft bass. If you want to add some sound to your vehicle without making drastic performance changes, quality car shops can help you choose “gentle” tuning techniques for your exhaust system.

They will adjust the sound level and quality to make your vehicle sound amazing at a relatively low cost.

The easiest way to change the sound is to mount a straight-flow muffler instead of the factory one, which will add loudness. There are also more complicated and “beautiful” ways to change the sound of the exhaust to your taste. A high-quality muffler can be chosen from our list at the top.

If you want to fundamentally change the sound of your vehicle, e.g. get deep, smooth bass, you need a professional and competent approach. Experts understand that the system of each vehicle is individual, and they are guided not only by physical data of the system but also consider parameters and characteristics of the engine in their calculations.

Weight. For any vehicle, weight is important, and the lower it is, the better. A lightweight exhaust system made of high-quality stainless steel is the right solution.

Appearance. Chrome elements, hundreds of tip options, finish styles, exhaust types, exhaust system roof, bumper, wing exits, etc… any fantasies can become your reality.

Reliability. An exhaust system made of stainless steel or titanium will last several times longer than the vehicle itself and will even outlive your grandchildren.

Conclusion

Note that when you increase the power of the vehicle by tuning the exhaust system, it usually reduces fuel consumption slightly, but customers do not actually notice this. This is due to the aggressive driving style of those who strive for maximum power and speed. In itself, the consumption becomes less.

Before starting the work, you should know your rights – experts should always agree on the project with the customer. An experienced mechanic will offer several options for tuning, approve the cost of service with you, and choose high-quality parts suitable for you in terms of price and design. At the end of the procedure, testing and verification should be performed.

FAQs

What is an exhaust manifold and header?

An exhaust manifold is a part of the attachments to the internal combustion engine. The manifold is designed to collect exhaust gases from several cylinders into one pipe. A header, in turn, is an aftermarket upgrade exhaust manifold that uses an individual steel tube for each cylinder. Headers are designed for performance applications, while exhaust manifolds are more utilitarian.

What is an exhaust catalytic converter?

An exhaust catalytic converter is a part of the vehicle’s exhaust system, an exhaust emissions control device designed to reduce air pollution. It reduces toxic gases and pollutants in exhaust gas from an internal combustion engine into less toxic pollutants by catalyzing a redox reaction (an oxidation and a reduction reaction).

What is piping?

Piping is usually a network of pipes (including fittings and valves) used to guide exhaust gases away from a controlled combustion inside an engine.

What is a muffler?

A muffler is a device that reduces noise/droning emitted by the exhaust system of an internal combustion engine. Such devices can be installed in various systems, e.g. ventilation systems that use mufflers to reduce ventilation equipment noise that occurs from the air in ventilation ducts.

What is a tailpipe?

A tailpipe is the end pipe of a vehicle’s exhaust system. It’s an outlet to expel engine exhaust gases from the vehicle.

What are Lake pipes?

It’s hot rodder slang that refers to a set of side pipes fitted to the exhaust of a car. Lake pipes are a stylish alternative, no-muffler exhaust system, normally capped, polished and long, derived from the secondary, racing-only exhaust systems initially used on vehicles that raced on dry lakes.

They are usually located all along the gap between the front and rear wheels of the vehicle on both sides of it. They were made by a company called Lake Manufacturing in the ‘50s and ‘60s. Lake pipes were a very popular aftermarket accessory for a lot of early American cars.

What does a header-back mean?

It’s an exhaust system that allows you to enlarge the diameter of your entire exhaust system to allow for greater exhaust gas volumes by replacing everything from the header collector to the tailpipes.

What does turbo-back mean?

A turbo-back is an alternative exhaust system that replaces almost the entire exhaust with uprated, better flowing pipework. It typically replaces the downpipe, catalytic converter, and cat-back system, so it’s a much more comprehensive system. Turbo-back systems produce more peak power and torque than cat-back systems but sacrifice a very small amount of mid-range power.

What does cat-back mean?

It’s an exhaust system that comes with all pipework and a muffler to replace everything behind the catalytic converter. If you are interested in pulling out ALL of the stops, go with the turbo-back. If you’d like to save some money and would like to change the tone of your factory exhaust, the cat-back’s your choice.

Also, consider reading these articles:

• Best Exhausts for 7.3L Powerstroke
• How to Engage a Four-Wheel Drive GMC Sierra?
• Best Exhausts for Camaro V6
• Top Lift Kits for Chevy Silverado 1500