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> Magnaflow vs Flowmaster Exhausts and Mufflers

Magnaflow vs Flowmaster Exhausts and Mufflers

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Exhaust systems are a great aftermarket add-on that can transform your ride. Large pipe diameters, performance mufflers, and precise bends lead to increased horsepower and more aggressive exhaust tones. The brand of aftermarket exhaust system you choose may differ greatly from another as each manufacturer strives for a different sound. Two of the most popular aftermarket exhaust system manufacturers, Magnaflow and Flowmaster, are highly sought after due to their distinct designs and sounds. In this guide, we’ll examine the details of both manufacturers’ exhaust systems to help you determine which brand is best for your ride.

Key Terms

Before we break down the different exhaust systems and mufflers available from each manufacturer, let’s look at some key terms that are common to both brands.
Image of a Flowmaster Delta Flow series muffler cutaway
Cutaway of a Flowmaster Delta series muffler. Note the angled baffles on the right.

Exit Style

This refers to the position of the tailpipe (or tailpipes) in an exhaust system. While many exhaust systems run their pipes to the rear, it’s not uncommon to see designs that exit to the side of the vehicle.

Exterior Noise

The exterior sound level generated by an aftermarket exhaust system relative to that created by the stock system.


The sound and vibration of the exhaust system as heard and felt within the cab.

Chambered Muffler

Image of a Magnaflow muffler cutaway
A cutaway view of a Magnaflow muffler. Note the perforated center section.
A muffler containing one or more internal sections made with noise-cancelling baffles is referred to as a chambered muffler. Depending on the number of chambers and baffles, the sound produced can range from slightly louder than stock to almost as loud as open exhaust.


Closer to a resonator than a muffler, this cylindrical sound dampener features a straight-through interior design with fiberglass packing between the inner and outer shells to reduce exterior noise and control exhaust tones.

Flow Through or Straight Through

Like a glasspack, this muffler design conducts gasses straight from the inlet to the outlet with no chambers or baffles, and tends to be louder than most chambered designs. Unlike a glasspack, it can be built with dual-in and/or dual-out configurations. For more details on mufflers, check out our performance muffler guide.

Magnaflow Exhaust Systems

Magnaflow carries a wide series of exhaust systems to accommodate daily drivers, off-road vehicles, racing vehicles, and more. Most Magnaflow exhaust systems are categorized according to the driving style or configuration of the vehicle in question.

When choosing a Magnaflow exhaust system, you will sometimes be prompted to choose which exit style you prefer. Choose rear exit if you want the exhaust to terminate at your rear bumper, or side exit if you prefer it exit from the side of your vehicle.

Image of a Magnaflow MF series exhaust system
An MF series exhaust system from Magnaflow.

MF Series

Magnaflow’s MF series exhaust system is designed to create a balance of interior resonance and exterior sound. This efficient design creates a slightly more aggressive tone than OE exhaust systems.
  • Sound: Mild to moderate
  • Construction: Stainless steel
  • Warranty: Lifetime

Image of a Magnaflow Off-Road series exhaust system
An Off-Road series exhaust system from Magnaflow.

Off-Road Pro

Ideal for a truck that will spend most of its time on tracks and trails, the Off-Road Pro series is lighter than other designs. It is also designed to increased ground clearance and to accommodate modified suspensions.
  • Sound: Moderate
  • Construction: Stainless steel
  • Warranty: Lifetime

Image of a Magnaflow catback exhaust system
A Magnaflow Competition series exhaust system.

Competition Series

This design incorporates elements intended to maximize power and exterior noise: larger pipe diameter, and a straight-through muffler design. The results, while impressive, are so loud and aggressive that they may not comply with local or even federal noise requirements. For this reason, this system is recommended strictly for racing applications.
  • Sound: Aggressive
  • Construction: Stainless steel
  • Warranty: Lifetime

Image of a Magnaflow Rock Crawler series exhaust system
A Rock Crawler exhaust system from Magnaflow.

Rock Crawler

This series is mostly found for Jeep Wranglers. It’s designed to accommodate aftermarket rear bumpers and provides maximum ground clearance for vehicles that will see extreme off-road conditions.
  • Sound: Aggressive
  • Construction: Stainless steel
  • Warranty: Lifetime


Magnaflow DPF Series

Image of a Magnaflow Pro DPF exhaust system
A Magnaflow Pro DPF exhaust system. Note the small holes (called venturis) in the exhaust tip which cool the very hot diesel exhaust gasses.
The DPF series is designed for vehicles equipped with diesel engines and extends from the diesel particulate filter. It features intercooled tips to reduce exhaust gas temperatures.
  • Sound: Moderate
  • Construction: Stainless steel
  • Warranty: Lifetime

Magnaflow Black DPF

All the features of the DPF series but with a sleek black finish.
  • Sound: Aggressive
  • Construction: Black stainless steel
  • Warranty: Lifetime on construction, and one year on finish

Magnaflow PRO DPF

This model does not include a muffler. While this creates an increase in power, it also dramatically increases noise, making this design less than ideal for street vehicles.
  • Sound: Aggressive
  • Construction: Stainless steel
  • Warranty: Lifetime

Aluminized Pro DPF

This version of the Pro DPF series is made with aluminized steel. Though not as corrosion-resistant as stainless steel, it is more affordable, making it popular with builders on a budget.
  • Sound: Aggressive
  • Construction: Aluminized steel
  • Warranty: One year

Flowmaster Exhaust Systems

While Magnaflow categorizes its exhaust systems according to utility, Flowmaster arranges its exhausts according to the level of sound and power they create. This is mostly accomplished by using increasingly aggressive mufflers and larger pipe diameters.

Flowmaster often includes exit pipes for both rear and side exhaust configurations in its kits. This allows you to try out both styles and decide which you prefer during installation.

Force II

Image of a Flowmaster Force 2 exhaust system
A Force 2 exhaust system from Flowmaster.
Flowmaster’s introductory exhaust system, the Force II system features the chambered 70 Series muffler with Delta Flow technology. If you’re looking for a mild exhaust upgrade that isn’t overwhelming, the Force II makes a great choice.
  • Sound: Mild
  • Construction: Stainless steel
  • Warranty: Lifetime



Image of a Flowmaster Flow FX exhaust system
A Flow FX exhaust system from Flowmaster.
A step above the Force II, FlowFX uses the same 70 series muffler with larger pipes to create more power and a louder exhaust note than the Force II.
  • Sound: Moderate
  • Construction: Stainless steel
  • Warranty: Lifetime


American Thunder

Image of a Flowmaster American Thunder exhaust system
The American Thunder exhaust system from Flowmaster.
The American Thunder system features a very aggressive exhaust note but maintains street-legal status in most areas. Comes with the Delta Flow Super 40 series muffler.
  • Sound: Aggressive
  • Construction: Stainless steel
  • Warranty: Lifetime


Outlaw Series

Image of a Flowmaster Outlaw series exhaust system
An Outlaw series exhaust system from Flowmaster.
Flowmaster’s most aggressive exhaust system, the Outlaw Series may not comply with local or federal noise ordinances. It includes the single chamber Super 10 series muffler which is only slightly quieter than running with no muffler at all.
  • Sound: Very aggressive
  • Construction: Stainless steel
  • Warranty: Lifetime

Performance Mufflers

One of the most important parts of most exhaust systems is the muffler. It plays a major role in determining the noise level, tone, and power gains a system provides. For this reason, the mufflers offered by these two manufacturers bear some examination.


Magnaflow offers four basic muffler configurations.
Image of a Magnaflow MF series muffler
A Magnaflow MF series muffler.

MF Series

The MF series from Magnaflow features a straight-through design and stainless steel construction. This design is also available with optional exhaust tips.


Image of a Magnaflow XL series muffler
A Magnaflow XL series muffler.


XL Mufflers

XL Mufflers feature a large-diameter body and a chambered design for a more refined exhaust sound. The perforated core directs harsh exhaust tones into the insulation material surrounding the chambered section.


Image of a Magnaflow glasspack muffler
A Magnaflow glasspack muffler.



This offers a straight-through design with one inlet and one outlet. Since a glasspack does little to deaden sound in comparison to larger-diameter mufflers, this is a great choice for customers seeking a loud, noticeable exhaust note.

Image of Magnaflow Race mufflers
Magnaflow Race mufflers.

Race Mufflers

The Race Muffler features a short, straight-through design with high-temperature packing material, making it ideal for vehicles subjected to the rigors of track use. The high noise level makes them less than ideal for street vehicles.



Many of Flowmaster’s mufflers feature patented Delta Flow technology. Delta-shaped baffles within the muffler chamber improve exhaust performance while reducing exterior noise. The following mufflers can be found in Flowmaster exhaust kits for pickup trucks and SUVs.

Image of a Flowmaster 70 series muffler
A Flowmaster 70 series muffler.

70 Series

This muffler features a three-chambered Delta Flow design for relatively quiet operation. Available in aluminized steel.


Image of a Flowmaster Super 40 muffler
Flowmaster Super 40 series muffler.


Super 40

The Super 40 muffler also uses Delta Flow baffles, but is based on a race muffler design. It creates a deep, aggressive tone. This muffler is available in both aluminized and stainless steel.

Image of a Flowmaster Super 40 muffler
Flowmaster Super 40 series muffler.

Super 10

The loudest muffler Flowmaster produces, the Super 10 features a single chamber Delta Flow design that produces an exhaust note only slightly quieter than a fully open exhaust. Available in stainless steel.

If you have questions about Flowmaster, Magnaflow, or any other exhaust brand we carry, contact our team of experts today. They’re standing by to help you take your ride from mild to wild.