Choosing the best cat-back exhaust system for a Ford Mustang GT involves balancing sound, performance, build quality, and price. The Flowmaster American Thunder stands out for its aggressive tone and proven durability, making it a popular overall choice. The BORLA S-Type systems are favored for their premium stainless steel construction and refined sound. Meanwhile, the MBRP Dual Split Rear offers a solid mix of performance and affordability for street-driven Mustangs. Each option comes with tradeoffs: some prioritize sound over ease of installation, others focus on durability at a higher cost. Continue reading for a detailed comparison to help you find the perfect fit for your Mustang GT.
Key Takeaways
- Top picks balance sound quality, durability, and installation ease, with the overall best offering aggressive tone and reliable performance.
- Premium stainless steel options like BORLA provide longer-lasting finishes but come at a higher price point.
- Budget-friendly systems such as MBRP still deliver solid performance without the premium price, ideal for everyday street use.
- Compatibility and fit vary across models and years; verifying your specific Mustang GT year is crucial.
- Choosing between deep tone and more refined sound depends heavily on personal preference, influencing the right choice for each driver.
More Details on Our Top Picks
Flowmaster 17312 American Thunder Cat-Back Exhaust Kit 2.5 Inch Aluminized Steel with 3 Inch Polished Stainless Tips Compatible with 1999-2004 Ford Mustang GT, MACH 1 and Bullitt with 4.6L SOHC engine
This Flowmaster system stands out for its classic American muscle tone, offering a balanced sound that appeals to enthusiasts seeking a deep, moderate roar without excessive raspiness. Compared with the Borla 140591, it delivers a more traditional muscle car exhaust note, though it may lack the ultimate refinement of Borla’s stainless steel construction. Installation is straightforward, thanks to included hardware and clear instructions, making it ideal for DIYers. The system’s aluminized steel ensures durability at a lower cost, but it’s more prone to corrosion over time than stainless options. A slight tradeoff is the heavier weight and less polished finish, which might bother those prioritizing aesthetics. This exhaust fits well on stock or mildly modified Mustangs and benefits those wanting a sound upgrade without sacrificing reliability.
Pros:- Deep, muscular sound that enhances muscle car character
- Relatively easy to install with included hardware
- Made from aluminized steel for cost-effective durability
Cons:- Less resistant to corrosion compared to stainless steel
- Heavier than some premium options like Borla
Best for: Mustang owners who want a classic, aggressive tone with simple installation and good durability.
Not ideal for: Buyers seeking a high-polish, corrosion-resistant stainless steel system or a quieter exhaust.
- Diameter:2.5 inches
- Material:Aluminized Steel
- Tips:3 inches Polished Stainless Tips
- Compatibility:1999-2004 Ford Mustang GT, Mach 1, Bullitt
- Installation:Includes hardware, straightforward
- Weight:59.2 pounds
Bottom line: This pick is perfect for enthusiasts wanting an authentic muscle car sound with a straightforward install.
MBRP 2024 Ford Mustang GT S650, 5.0 Aluminized Steel 3in Cat-Back Dual Split Rear (Street)
Compared to the Borla 140590BC, this MBRP system offers a more affordable route to improved exhaust flow with its 3-inch mandrel-bent tubing, which enhances throttle response and horsepower. It features dual split rear tips, giving a sportier look, but it doesn’t match Borla’s stainless steel finish or sound refinement. The aluminized steel construction balances cost and longevity, though it may not last as long as fully stainless options. Installation is straightforward but requires some basic mechanical skills. Its improved flow can boost performance, but it might produce a slightly louder and less polished tone than Borla’s more refined sound. This setup is suited for drivers wanting a noticeable performance increase without the expense of high-end stainless systems.
Pros:- Enhanced exhaust flow for better throttle response
- Affordable price point with solid aluminized steel durability
- Sporty dual split rear tips for aggressive styling
Cons:- Less corrosion resistant than stainless steel
- Potentially louder and less refined than Borla
Best for: Budget-conscious Mustang owners looking for a noticeable performance gain and a sportier appearance.
Not ideal for: Buyers seeking a quieter, more polished, or corrosion-proof stainless steel exhaust.
- Tubing Diameter:3 inches
- Material:Aluminized Steel
- Tips:Dual Split Wall Tips, 4.5 inches
- Compatibility:2024 Ford Mustang GT S650
- Design:Mandrel Bent Tubing
- Weight:Not specified
Bottom line: This exhaust provides solid performance improvements at a friendly price, ideal for budget-minded enthusiasts.
BORLA 140591 Cat-Back Performance Exhaust System for 2015-2017 Ford Mustang GT/GT Convertible 5.0L V8 Automatic/Manual Transmission
This BORLA system makes the list for its all-T-304 stainless steel construction, offering unmatched durability and a sleek, corrosion-resistant finish. Its classic BORLA sound is more refined and aggressive than stock, but not as raspy as some aftermarket systems, making it a favorite for those seeking a balance of loudness and sophistication. Compared with the Flowmaster 17312, it provides a more premium build and a louder, more attention-grabbing tone. The installation is bolt-on, straightforward for experienced DIYers or professional installers. The main tradeoff is the higher price point, which might deter budget-conscious buyers. This system is best suited for Mustang owners looking for a long-lasting, high-quality exhaust with a signature BORLA tone.
Pros:- Premium T-304 stainless steel construction for corrosion resistance
- Signature BORLA sound—loud but refined
- Easy bolt-on installation
Cons:- Higher cost compared to aluminized steel options
- Louder than stock, which may be undesirable for some
Best for: Owners who want a durable, high-end exhaust with a signature sound and premium stainless steel finish.
Not ideal for: Budget buyers or those preferring a less aggressive or quieter tone.
- Material:T-304 Stainless Steel
- Pipe Diameter:2.5 inches
- Tips:4 inches, angle-cut
- Compatibility:2015-2017 Ford Mustang GT/Convertible
- Finish:Polished Stainless Steel
- Installation:Bolt-on
Bottom line: This system is ideal for enthusiasts seeking a durable, high-quality exhaust with a refined, aggressive tone.
BORLA 140590BC Cat-Back Performance Exhaust System for 2015-2017 Ford Mustang GT/GT Convertible 5.0L V8 Automatic/Manual Transmission
Compared with the Borla 140591, this 140590BC version offers a slightly more aggressive tone, making it perfect for drivers who want an unmistakably loud and raspy exhaust. Its stainless steel construction ensures longevity, and the split rear exit with polished tips adds a professional appearance. Installation is straightforward, with all components bolt-on easily, but it’s more suited to those who enjoy a loud, attention-grabbing sound. The main tradeoff is the increased noise level, which may not appeal to those seeking a more subdued or refined tone. If you want your Mustang to stand out with an aggressive, race-inspired exhaust note, this Borla is an excellent choice.
Pros:- Loud, aggressive, raspy exhaust tone
- Made from durable T-304 stainless steel
- Easy bolt-on installation with included hardware
Cons:- Very loud, may not suit daily commuting
- More expensive than aluminized steel systems
Best for: Mustang owners craving a loud, raspy exhaust with long-lasting stainless steel quality.
Not ideal for: Buyers wanting a quieter or more refined exhaust system or those sensitive to noise.
- Material:T-304 Stainless Steel
- Pipe Diameter:2.5 inches
- Tips:4 inches, angle-cut
- Compatibility:2015-2017 Ford Mustang GT
- Exit Type:Split Rear
- Finish:Polished Stainless
Bottom line: This exhaust is perfect for drivers who want an aggressive sound and durable build for their Mustang.
BORLA 140590BC Cat-Back Performance Exhaust System for 2015-2017 Ford Mustang GT/GT Convertible 5.0L V8 Automatic/Manual Transmission
This BORLA system is distinguished by its premium T-304 stainless steel build, ensuring longevity and resistance to corrosion, making it a top choice for longevity-minded owners. Its aggressive but controlled sound complements the car’s performance profile, providing a loud, raspy exhaust note that turns heads. Unlike aluminized steel systems like MBRP, it resists rust and maintains a polished appearance over time. Installation is bolt-on and straightforward, suitable for both DIYers and professionals. The main tradeoff is the premium price, which reflects its high-quality materials and engineering. If durability and a signature BORLA tone are priorities for your Mustang, this system justifies the investment.
Pros:- High-quality T-304 stainless steel for corrosion resistance
- Signature loud, raspy BORLA sound
- Long-lasting finish with a sleek look
Cons:- Higher price point than aluminized steel alternatives
- Loud exhaust may be loud for daily drivers
Best for: Mustang owners who want a durable, corrosion-resistant exhaust with a bold, aggressive tone.
Not ideal for: Those on a tight budget or preferring a quieter exhaust system.
- Material:T-304 Stainless Steel
- Pipe Diameter:2.5 inches
- Tips:4 inches, angle-cut
- Compatibility:2015-2017 Ford Mustang GT
- Finish:Polished Stainless
- Installation:Bolt-on
Bottom line: This system is ideal for owners prioritizing durability and signature BORLA sound without concern for cost.
Pypes Exhaust SFM10V Violator 2-1/2″ Diameter 409 Stainless Steel Cat-Back Exhaust System for Ford Mustang GT
This Pypes Violator system stands out for offering a compelling balance between sound, performance, and affordability. Compared to the Borla systems, it provides a more aggressive tone at a lower price point, making it ideal for enthusiasts who want a noticeable sound without breaking the bank. The mandrel-bent 2-1/2″ tubing enhances exhaust flow, boosting power modestly. However, its steel construction, while durable, isn’t as corrosion-resistant as stainless steel options, meaning it might require more maintenance over time. The system’s loudness level is aggressive but not overwhelming, making it suitable for street-driven Mustangs. The straightforward installation process is a plus, though it may lack the refined fit and finish of higher-end systems like Borla. This pick makes the most sense for budget-conscious owners seeking a bold sound and performance boost without a hefty price tag.
Pros:- Affordable price point making it accessible for budget builds
- Mandrel-bent tubing enhances exhaust flow and performance
- Deep, aggressive exhaust tone that turns heads
Cons:- Steel construction can be prone to rust over time
- Less refined fit compared to premium brands like Borla
Best for: Mustang owners seeking an aggressive exhaust tone and performance upgrade on a budget.
Not ideal for: Those looking for a refined, quiet ride or long-term corrosion resistance, as steel may rust faster than stainless options.
- Diameter:2-1/2 inches
- Material:409 Stainless Steel
- Construction:Mandrel-bent tubing
- Installation:Direct bolt-on
- Sound:Aggressive, deep tone
- Performance boost:Moderate
Bottom line: This system is ideal for budget-minded Mustang owners who want a loud, performance-oriented exhaust with easy installation.
Flowmaster 17116 American Thunder Cat-Back Exhaust Kit 2.5 Inch Aluminized Steel Compatible with 1987-1993 Ford Mustang GT 5.0L engine
Compared to the Borla S-Type, this Flowmaster American Thunder kit excels in delivering a classic, throaty V8 rumble that many enthusiasts cherish. Its aluminized steel tubing offers good durability at a lower cost, though it doesn’t match the stainless steel resistance of Borla’s premium systems. The mandrel-bent 2.5″ pipes optimize exhaust flow, providing modest horsepower gains, especially appreciated on older Mustang models like the 1987-1993 GT. Installation is straightforward with factory hanger compatibility, making it a solid choice for DIYers. However, it can produce more drone at highway speeds than the Borla, which some find intrusive. The tone is undeniably aggressive but less refined than Borla’s stainless steel systems. This kit makes sense for owners of classic Mustangs who want authentic sound and performance without the premium price.
Pros:- Authentic classic V8 sound that appeals to enthusiasts
- Easy to install with factory hanger compatibility
- Cost-effective upgrade for older models
Cons:- Aluminized steel is less resistant to corrosion than stainless steel
- Can produce noticeable drone on highway cruising
Best for: Owners of older Mustang GTs seeking a robust, vintage V8 exhaust tone with reliable performance.
Not ideal for: Those who prefer a quieter or more refined exhaust system, as drone and noise levels are higher than more modern systems like Borla.
- Diameter:2.5 inches
- Material:Aluminized Steel
- Construction:Mandrel-bent tubing
- Installation:Factory hanger compatible
- Sound:Deep, throaty V8 roar
- Performance boost:Moderate
Bottom line: This kit is perfect for vintage Mustang owners wanting an authentic sound and performance boost at a reasonable price.
BORLA 140135 Cat-Back Performance Exhaust System for 2005-2009 Ford Mustang GT 4.6L V8 & Shelby GT500 5.4L V8
This Borla S-Type system stands out for its T-304 stainless steel construction, promising longevity and resistance to corrosion, unlike aluminized steel alternatives like Flowmaster’s. Its dual split rear exit with 4″ chrome tips provides an aggressive yet refined appearance, complemented by the distinctive Borla sound—deep and powerful without excessive drone. Compared to the Flowmaster, Borla offers a more polished fit and finish, and the sound is less intrusive at cruising speeds, making it suitable for daily driving. Installation is straightforward, thanks to its bolt-on design, though its premium price reflects its quality. For those who prioritize durability, a refined aesthetic, and a balanced exhaust note, Borla is a clear choice. However, it may be pricier than other brands like Pypes or Flowmaster, which could deter budget-conscious buyers.
Pros:- High-grade T-304 stainless steel for corrosion resistance
- Deep, refined exhaust note with minimal drone
- Premium fit and finish with attractive chrome tips
Cons:- Higher price point compared to aluminized steel systems
- Less aggressive sound compared to Pypes Violator
Best for: Mustang owners wanting a durable, high-quality exhaust with a refined, powerful sound for daily use.
Not ideal for: Budget-conscious enthusiasts who prefer a louder, more aggressive tone or are willing to sacrifice longevity for cost.
- Material:T-304 Stainless Steel
- Construction:All welded
- Tips:4-inch chrome split dual
- Sound:Deep, balanced with minimal drone
- Fitment:Bolt-on
- Application:2005-2009 Mustang GT & Shelby GT500
Bottom line: This Borla system is ideal for drivers seeking a durable, refined performance exhaust with a premium finish and sound.
BORLA 140067 Cat-Back Performance Exhaust System for 1999-2004 Ford Mustang GT 4.6L V8 & 2003-2004 Mach 1
This Borla system is well-suited for owners of older Mustang models, delivering a deep, clean V8 growl that appeals to purists. Its stainless steel construction ensures durability, and the dual split rear exit with 4″ chrome tips offers a bold, aggressive look. Compared to the more modern Borla systems, this setup emphasizes a classic, unfiltered exhaust sound that enthusiasts love. The fit is precise, and installation is straightforward, but the system’s sound profile might be too loud for some daily drivers, especially those seeking a quieter experience. The system’s build quality and sound make it stand out for classic Mustang restorers or enthusiasts who prioritize authentic power and tone. However, newer systems like Borla’s 2005-2009 model offer more refined performance and less drone.
Pros:- Durable stainless steel construction for longevity
- Deep, aggressive V8 growl loved by enthusiasts
- Easy bolt-on installation with precise fit
Cons:- Can produce louder, more intrusive noise levels
- Less refined sound compared to newer Borla systems
Best for: Owners of late 90s to early 2000s Mustangs wanting authentic, aggressive exhaust tone and reliable durability.
Not ideal for: Owners of newer models or those preferring a more subdued, refined exhaust note for daily comfort.
- Material:T-304 Stainless Steel
- Construction:All welded
- Tips:Dual split rear, 4″ chrome
- Sound:Deep, aggressive V8 tone
- Application:1999-2004 Mustang GT & Mach 1
- Fitment:Bolt-on
Bottom line: This system suits classic Mustang owners who want authentic, powerful sound and durable build quality.
