What’s the best exhaust system for a 2015-present Ford Mustang S550?

The term “best” is subjective. Best-selling? Best or top-reviewed? Or is it best bang-for-your-buck?

In an effort to cover all our bases, we looked at some of the best Mustang S550 exhaust systems through a few different lenses to present some viable options for your upgrade. We solicited some help from our friends at Summit Racing. We also found sound clips for each of the most-popular and top-reviewed systems (note: applications shown in the clips may vary from your vehicles).

Here we go:

Best By Popularity

In this scenario, we talked with Summit Racing to compile five of its more popular exhaust systems (in no particular order). These are some of the best-selling exhausts for S550 in terms of demand:

Roush Axle-Back Exhaust Systems

Description: Made from 304 stainless steel, these systems produce a deep exhaust tone. Read full description.

Applications: Ecoboost and GT

Sound Clip:

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Borla ATAK Cat-Back Exhaust Systems

ATAK stands for acoustically tuned applied kinetics, which translates into high decibel, yet extremely clear sound output. Read full description.

Applications: Ecoboost, GT, and Shelby GT350 and GT350R

Sound clip:

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Borla S-Type Cat-Back Exhaust Systems

These 300-series stainless steel cat-back exhaust systems feature patented straight-through and multi-core technology to unleash hidden horsepower and produce a more aggressive sound and higher flow.  Read full description.

Applications: Ecoboost and GT

Sound clip:

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XForce Varex Exhaust Systems

This 304 system features XForce’s patented muffler innovation, Varex, that’s engineered with sophisticated butterfly valve mechanisms. This allows you to choose optimal power output and sound levels to meet your desired preference by directing the flow of exhaust gases.  Read full description.

Applications: Ecoboost and GT

Sound clip:

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Flowmaster Outlaw Series Exhaust Systems

The Outlaw series exhaust system puts out bold, dynamic interior and exterior exhaust tones. Read full description.

Applications: Ecoboost and GT

Sound clip:

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Best by Reviews

For this exercise, we looked at 4.5 and 5-star-rated exhaust systems on the Summit Racing site and then picked the exhausts with the most reviews. This allowed us to include the exhaust systems with the most positive feedback.

Corsa Sport Exhaust Systems

These cat-back systems feature a straight-through, non-restrictive design for an aggressive sound without droning. The design also reduced backpressure to produce more horsepower–and a setup that has yielded rave reviews on Summit Racing’s website. Full description here.

Applications: GT

Sound clip:

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Flowmaster Stainless Steel American Thunder Exhaust Systems

Flowmaster has taken its long heritage of exhaust design and innovation to give this system the latest exhaust technology available. Through this technology, you will experience improvements in acceleration, passing power, and fuel mileage.  Read full description.

Applications: Ecoboost and GT

Sound clip:

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MagnaFlow Street Series Performance Exhaust Systems

Street Series exhaust systems feature straight-through flow designs for the ultimate in unrestricted horsepower and torque, while maintaining exhaust efficiency. These kits are an engineered balance of interior and exterior noise levels and are tested against SAE j1169 standards. Read full description.

Applications: Ecoboost and GT

Sound clip:

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Borla Touring Cat-Back Exhaust Systems

Borla Touring systems deliver increased exhaust velocity for added power and driving excitement, along with that distinctive Borla Sound of Power that’s respected by motoring enthusiasts everywhere. Read full description.

Applications: Ecoboost

Sound clip:

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MBRP Installer Series Exhaust System

MBRP Installer Series exhaust systems are constructed from heavy-duty, 16-gauge steel with an aluminized coating and an extra-thick layer of aluminum silica on the seams, an area often left exposed to rust.  Read full description.

Applications: Ecoboost and GT

Sound clip:

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Best By Price

If you’re looking for performance on a budget, here are four more exhaust systems for good measure. *Keep in mind…the pricing listed is as-of August 2019. Unfortunately, we were not able to locate sound clips for all of them.

Flowtech Axle-Back Exhaust Systems

Flowtech axle-back exhaust systems are the perfect combination of quality and value. The systems are made from 304 stainless steel and come with all the hardware you need. Read full description.

Price:* $299.99

Applications: 2015-up Ecoboost and GT

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NXT Step Performance

NXT Step all-stainless steel systems feature polished T304 materials, and mandrel bends for maximum flow and power. The systems are finished with double-walled, beveled-edge polished tips. NXT Step high-performance systems are tested to meet their high standards for sound quality. Read full description.

Price:* Starting at $349.99

Applications: Ecoboost, GT, Shelby Models

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MBRP Pro Series Exhaust Systems

Constructed from T304 stainless steel for optimal durability and reliability, Pro Series systems deliver a rich, mellow exhaust note and over 70 percent increased exhaust flow, according to MBRP. Read full description.

Price:* Starting at $394.99

Applications: Base, GT, Shelby GT500

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MBRP Black Series Exhaust Systems

These cat-back systems are built from aluminized steel, with a durable high-heat black powdercoat finish. Fully mandrel-bent tubing, with minimal bend degree angles, allows the exhaust to exit quickly; and the seams are fully sealed to resist rust. Read full description.

Price:* Starting at $419.99

Applications: Ecoboost and GT