Finding the best cat-back exhaust system for your Ford Mustang GT involves balancing sound, performance, and price. The Flowmaster 17312 American Thunder makes a strong case for overall quality with its deep tone and durable construction, while the Borla 140135 stands out for its premium craftsmanship and refined sound. On the other hand, budget-friendly options like the MBRP 99-04 provide solid performance without breaking the bank. Buyers face tradeoffs between aggressive sound, installation complexity, and long-term durability. Continue reading for a detailed comparison to help you find the perfect fit for your Mustang.
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Key Takeaways
- Top picks vary based on sound preference, with Flowmaster delivering aggressive tones and Borla offering a more refined experience.
- Material quality significantly impacts durability, especially for long-term performance in different climates.
- Installation ease differs, with some systems designed for straightforward bolt-on upgrades, while others may require more modification.
- Price ranges widely, but spending more typically yields better sound quality and longevity.
- The best system aligns with your driving habits—whether daily commuting, track use, or show car status.
| cat-back exhaust systems for Ford Mustang GT | Material | Tips |
|---|---|---|
| Flowmaster 17213 American Thun | Aluminized Steel | — |
| Flowmaster 17116 American Thun | Aluminized Steel | — |
| MBRP 99-04 Ford Mustang GT/Mac | Aluminum | 3.5 inches dual wall |
| Pypes Violator 2-1/2" Diameter | 409 Stainless Steel | — |
| BORLA 140135 Cat-Back Performa | T-304 Stainless Steel | Dual split rear exit, 4-inch chrome tips |
| Borla 140067 Cat-Back Performa | T-304 Stainless Steel | 4" round chrome tips on each side |
| MBRP S7205BLK 3" Cat Back Exha | Stainless Steel | Quad 4" Dual Wall Tips |
| MBRP Mustang GT 5.0L T304 SS 2 | T304 stainless steel | Quad carbon fiber tips |
| Flowmaster 17312 American Thun | Aluminized Steel | — |
More Details on Our Top Picks
Flowmaster 17213 American Thunder Cat-Back Exhaust Kit for Ford Mustang LX 5.0 and GT (1986-1993)
This vintage-inspired exhaust kit stands out for its deep, aggressive tone that appeals to owners wanting a muscle car sound. Its mandrel-bent aluminized steel tubing and stainless steel tailpipes deliver durability, but compared with the newer Borla systems, it may lack some refinement and comes with a risk of rust over time. Installation is straightforward thanks to factory hanger compatibility, yet the aluminized steel could require future replacement or upgrade. This kit is perfect for classic Mustang owners seeking a bold sound without the premium price of stainless steel systems.
Pros:- Deep, aggressive exhaust tone enhances muscle car character
- Easy installation with factory hangers and hardware
- Stainless steel tailpipes add durability to the exhaust outlet
Cons:- Aluminized steel may rust over time without additional coating or maintenance
- May require professional tuning for optimal performance
- Limited compatibility to specific older Mustang models
Best for: Owners of 1986-1993 Ford Mustang LX and GT models who want an aggressive, vintage exhaust tone.
Not ideal for: Those looking for a system with long-term corrosion resistance or modern styling, as aluminized steel may rust faster and it’s limited to older Mustang models.
- Material:Aluminized Steel
- Tubing Diameter:2.5 Inch
- Tailpipe Material:304 Stainless Steel
- Series:Super 44
- Compatibility:1986-1993 Ford Mustang LX and GT
Our verdict“This kit appeals most to owners of vintage Mustangs wanting a bold sound and straightforward install, accepting potential durability tradeoffs.”
Flowmaster 17116 American Thunder Cat-Back Exhaust Kit for 1987-1993 Ford Mustang GT 5.0L
Compared to the original Flowmaster 17213, this model offers a slightly more refined design with the same aggressive Super 44 mufflers, making it ideal for owners seeking maximum performance with a fierce exhaust note. Its mandrel-bent aluminized steel tubing and heavy-duty hardware ensure durability, but at over 23 kg, it’s heavier and may be more cumbersome during installation. While it’s tailored for 1987-1993 Mustang GTs, some users report rust issues over time, similar to other aluminized steel systems. This system makes sense for those prioritizing performance and sound over weight or ultra-long-term rust resistance.
Pros:- Deep, aggressive exhaust sound enhances muscle car character
- Heavy-duty build with durable aluminized steel
- Includes hangers and hardware for easy installation
Cons:- Heavy weight may complicate installation or handling
- Potential rust over time, similar to other aluminized steel systems
- Limited to specific model years
Best for: Owners of 1987-1993 Mustang GTs wanting a high-performance exhaust with a deep, aggressive tone.
Not ideal for: Owners seeking the lightest system or needing a rust-proof option, as the weight and aluminized steel could be drawbacks.
- Material:Aluminized Steel
- Tubing Diameter:2.5 inches
- Included Components:Hangers and Hardware
- Item Weight:23.12 kg
- Warranty:3-year Limited Warranty
- Compatibility:1987-1993 Ford Mustang GT 5.0L
Our verdict“Best suited for performance-focused owners who prioritize sound and durability over weight and long-term rust resistance.”
MBRP 99-04 Ford Mustang GT/Mach 1 2.5in Dual Split Rear Aluminum Catback Exhaust with 3.5in Dual Wall Tips
This system is the choice for Mustang owners seeking noticeable torque and horsepower improvements, surpassing the stock exhaust’s capabilities. Its dual split rear design with large 3.5-inch tips offers a sporty look, yet installation might require modifications for a perfect fit, especially on stock mounts. Compared to the Flowmaster options, the MBRP provides a more modern aesthetic and a louder, potentially more aggressive sound, but the use of aluminum, while lightweight, may not match the durability of stainless steel systems. It’s best suited for those prioritizing performance upgrades and a stylish finish.
Pros:- Significant torque and horsepower gains
- Stylish dual wall tips enhance appearance
- Reduces exhaust gas temperatures for better engine efficiency
Cons:- Installation may require modifications
- Potentially louder exhaust note might not suit all preferences
- Aluminum construction may lack long-term durability
Best for: Owners of 1999-2004 Mustang GT or Mach 1 looking for performance improvements and a fashionable rear tip setup.
Not ideal for: Buyers seeking a stainless steel system for longevity or those uncomfortable with potential installation modifications.
- Fitment:1999-2004 Ford Mustang GT/Mach 1
- Diameter:2.5 inches
- Tips:3.5 inches dual wall
- Material:Aluminum
Our verdict“This pick is ideal for performance enthusiasts wanting a stylish, gains-oriented exhaust system with a louder tone and aggressive look.”
Pypes Violator 2-1/2″ Diameter Stainless Steel Cat-Back Exhaust System for Ford Mustang GT
The Pypes Violator system offers a solid balance of performance and durability, with its 409 stainless steel construction providing corrosion resistance that aluminized steel systems like Flowmaster’s may lack over time. Its 2.5-inch diameter pipe promotes good exhaust flow, making it a practical upgrade for daily driving and spirited runs. Unlike the more aggressive and louder systems, this exhaust offers a more refined tone that still improves flow and performance. However, installation can be technically challenging, and the increase in noise may be more than some owners prefer. This system is perfect for those wanting a reliable, durable upgrade without sacrificing too much refinement.
Pros:- High corrosion resistance with stainless steel
- Improves exhaust flow and engine performance
- Designed specifically for Mustang GT
Cons:- Installation may require technical skills
- May produce increased exhaust noise, not ideal for quiet driving
- Limited aesthetic customization options
Best for: Daily drivers and enthusiasts who want a durable, reliable system with improved flow and a moderate exhaust note.
Not ideal for: Owners seeking a very loud or heavily aggressive sound, or those who prefer easy bolt-on installation with minimal technical skills.
- Diameter:2-1/2 inches
- Material:409 Stainless Steel
- Application:Ford Mustang GT
Our verdict“This exhaust system strikes a good balance between durability and performance for owners who want reliable, long-lasting upgrades.”
BORLA 140135 Cat-Back Performance Exhaust System for 2005-2009 Ford Mustang GT & Shelby GT500
Compared to the earlier options, the Borla 140135 stands out for its all-welded T-304 stainless steel construction, promising greater longevity and a cleaner, more refined sound. Its dual split rear exit with chrome tips adds a sleek, modern look, while the no-drone design enhances comfort during long drives. While it commands a premium price, this system is best suited for owners who prioritize high-quality materials, ease of installation, and a quieter, more refined exhaust note. However, some might find the sound less aggressive than the Flowmaster or MBRP options, which could be a downside for enthusiasts seeking a louder roar.
Pros:- High-quality T-304 stainless steel construction
- All-welded, leak-proof design
- No-drone technology ensures quiet comfort during highway cruising
Cons:- Premium price point may be prohibitive
- Installation might require professional help for perfect fit
- Less aggressive sound profile compared to Flowmaster or MBRP
Best for: Owners of 2005-2009 Mustang GT and Shelby GT500 who want a durable, high-end exhaust with a refined tone and easy installation.
Not ideal for: Budget-conscious buyers or those seeking an extremely aggressive exhaust sound, as Borla’s tone is more subdued.
- Material:T-304 Stainless Steel
- Installation:Bolt-on
- Construction:All welded
- Application:2005-2009 Ford Mustang GT & Shelby GT500
- Tips:Dual split rear exit, 4-inch chrome tips
- Made in:USA
Our verdict“Best suited for owners wanting a durable, high-quality exhaust with a refined, quiet performance and premium build quality.”
Borla 140067 Cat-Back Performance Exhaust System for 1999-2004 Ford Mustang GT & 2003-2004 Mach 1 4.6L V8
This Borla system stands out for its all-welded T-304 stainless steel construction, offering exceptional durability that surpasses aluminized steel options like Flowmaster’s kits. Its bolt-on design simplifies installation, making it accessible for DIY enthusiasts, yet it maintains a refined sound with a no-drone guarantee—ideal for drivers who want a smooth, performance-enhanced ride. Compared with the Flowmaster 17312, Borla provides a quieter, more refined exhaust note, though it comes at a higher price point. The dual chrome tips add a premium look, enhancing aesthetics without sacrificing performance. The main tradeoff is the cost, which is higher than many alternatives, and some mechanical skill may be needed for installation.Pros:- Durable T-304 stainless steel construction for long-term use
- Easy bolt-on installation suitable for DIYers
- No-drone guarantee ensures a smooth, refined ride
- Enhanced exhaust sound and dual chrome tips for aesthetics
Cons:- Higher price compared to other stainless steel options
- Installation may require some mechanical skill
Best for: Mustang owners seeking a durable, high-quality exhaust with a smooth sound and easy installation.
Not ideal for: Budget-conscious buyers or those seeking a loud, aggressive exhaust tone for maximum noise.
- Material:T-304 Stainless Steel
- Installation:Bolt-on
- Construction:All welded
- Application:1999-2004 Ford Mustang GT, 2003-2004 Mach 1 4.6L V8
- Tips:4″ round chrome tips on each side
Our verdict“This system is perfect for Mustang owners prioritizing durability and a smooth, refined exhaust experience.”
MBRP S7205BLK 3″ Cat Back Exhaust System for 2018-Up Ford Mustang GT with Quad 4″ Dual Wall Tips, Black Coated
This MBRP system is tailored for 2018 and newer Mustang GTs, featuring 3-inch mandrel-bent tubing that maximizes exhaust flow—making it a solid upgrade over stock systems like the Flowmaster 17116, which often focus more on sound than flow efficiency. Its black-coated finish offers a sleek, aggressive look, especially appealing for owners aiming for a murdered-out aesthetic. The quad stainless steel tips add a distinct visual flair, perfect for street performance enthusiasts. However, the black coating is best suited for dry climates since salt exposure could cause corrosion over time. Installation might be best left to professionals, especially for those unfamiliar with exhaust systems, and sound levels are not clearly specified, which could be a concern for some buyers.Pros:- Sleek black coated finish resistant to rust
- Mandrel-bent tubing for optimal exhaust flow
- Quad stainless steel tips for enhanced appearance
- Designed specifically for 2018 and newer Mustang GTs
Cons:- Black coating may be less durable in salty environments
- Installation may require professional help
- Sound levels are not clearly specified
Best for: Mustang owners who want a stylish, high-performance exhaust with a dark, aggressive look and improved airflow.
Not ideal for: Drivers in salty or coastal environments where the coating might degrade or those seeking a loud, aggressive exhaust tone without clear noise level info.
- Brand:MBRP
- Model Number:S7205BLK
- Item Weight:55 pounds
- Material:Stainless Steel
- Inclusions:Exhaust System
- Tips:Quad 4″ Dual Wall Tips
Our verdict“Ideal for modern Mustang owners craving a stylish, performance-oriented exhaust with a stealthy look.”
MBRP Mustang GT 5.0L T304 SS 2.5in Axle-Back Dual Rear Exit with Quad CF Tips for 2018-2021 Ford
This MBRP axle-back excels at delivering a loud, aggressive exhaust note that appeals to those who want their Mustang to stand out, especially compared to quieter systems like Flowmaster 17312. Its T304 stainless steel construction ensures longevity, and the quad carbon fiber tips give a distinctive, high-performance appearance. The dual rear exit design improves exhaust flow, which can boost performance slightly over stock. Installation may require professional help, particularly for those unfamiliar with exhaust modifications, and the louder sound could be overwhelming for daily drivers or those in noise-sensitive areas. It’s best suited for enthusiasts who prioritize sound and style over subtlety.Pros:- Durable T304 stainless steel for long-term use
- Enhanced exhaust flow and performance
- Aggressive sound with distinct exhaust note
- Stylish quad carbon fiber tips
Cons:- Installation may require professional assistance
- Potentially very loud for daily use
- Design specific to certain model years
Best for: Mustang owners seeking a bold, aggressive exhaust tone with a stylish look for spirited driving.
Not ideal for: Owners looking for a quieter ride or those in noise-restricted neighborhoods, as this system is quite loud.
- Material:T304 stainless steel
- Inlet Diameter:2.5 inches
- Exit Type:Dual rear exit
- Tips:Quad carbon fiber tips
- Fitment:2018-2021 Ford Mustang GT 5.0L
Our verdict“This system suits Mustang owners who crave a loud, aggressive exhaust with a striking appearance for spirited drives.”
Flowmaster 17312 American Thunder Cat-Back Exhaust Kit for 1999-2004 Ford Mustang GT, MACH 1, and Bullitt
Flowmaster’s 17312 offers a balanced approach, combining dyno-tuned mufflers with large polished stainless steel tips that deliver a moderate, refined exhaust tone. Compared to the more aggressive MBRP options, this kit emphasizes a smooth, classic muscle car sound that appeals to traditional Mustang enthusiasts. Its easy installation, with included hardware, makes it accessible for DIYers, although the aluminized steel construction might not last as long as stainless steel options. This system is perfect for owners who want a reliable, performance-focused upgrade without excessive noise or style fuss, but it may lack the visual flair of more modern or aggressive designs.Pros:- Easy installation with included hardware and hangers
- Polished stainless steel tips for a sleek look
- Dyno-tuned mufflers for maximum performance
- Moderate exhaust tone suitable for daily driving
Cons:- Limited compatibility outside specific models
- Aluminized steel may degrade faster than stainless steel
- Performance gains are moderate and depend on vehicle setup
Best for: Owners seeking a classic, balanced exhaust sound with proven performance and straightforward installation.
Not ideal for: Those desiring a loud, aggressive tone or a highly stylized appearance; it’s better suited to purists and daily drivers.
- Material:Aluminized Steel
- Tip Size:3 inches
- Inlet Size:2.5 inches
- Compatibility:1999-2004 Ford Mustang GT, MACH 1, Bullitt
- Engine:4.6L SOHC
Our verdict“This kit offers a reliable, balanced upgrade ideal for enthusiasts wanting a classic muscle car sound and straightforward installation.”
How We Picked
I evaluated these exhaust systems based on several key factors: build quality, sound profile, ease of installation, material durability, and overall value. Systems that offered a noticeable performance boost without excessive complexity earned higher scores. I also considered customer reviews and brand reputation to ensure longevity and consistent quality. The ranking reflects a balance between affordability and premium features, aiming to recommend options suitable for different types of Mustang owners seeking reliability and performance.Factors to Consider When Choosing Best Cat-back Exhaust Systems For Ford Mustang GT
Choosing the right cat-back exhaust system for your Ford Mustang GT involves understanding several critical factors. Besides raw sound and appearance, you should consider how the system impacts performance, durability, and daily usability. Making an informed decision ensures you get the best fit for your driving style and long-term goals, whether that’s boosting horsepower or just achieving a throaty growl.Sound and Tone
Sound is arguably the most noticeable feature of a cat-back system. Some owners prefer a deep, aggressive growl, while others want a more subdued tone for daily driving. Consider systems like Flowmaster for a louder, more aggressive note, or Borla for a refined, high-quality sound. Keep in mind that louder systems may attract more attention and could be less suitable for neighborhood or city driving.
Material and Durability
Stainless steel is the gold standard for longevity, resisting rust and corrosion better than aluminized steel. For Mustang owners in areas with harsh weather or road salt, investing in a system with T304 stainless steel might mean higher upfront costs but longer-lasting performance. Cheaper materials may save money initially but could require replacement sooner, especially under heavy use or in corrosive environments.
Installation and Compatibility
Ease of installation varies, with many systems designed for bolt-on upgrades, but some may need custom fitting or modifications. Check the system’s compatibility with your specific model year and trim. If you’re not comfortable with mechanical work, choosing a kit that’s straightforward to install can save time and additional costs. Remember, a system that’s too complex might negate the savings if you need professional help.
Performance Gains
While many systems advertise horsepower and torque improvements, actual gains depend on the overall setup of your Mustang. Some systems emphasize sound and aesthetics more than performance. Look for options with mandrel-bent piping and free-flowing mufflers if performance is your priority. Keep in mind that a louder exhaust doesn’t always mean better performance—sometimes it’s more about sound customization.
Price and Value
Prices can range from budget-friendly to premium, with higher costs often reflecting better materials and craftsmanship. Balance your budget with your expectations; investing in a higher-end system like Borla may provide better durability and sound, but a mid-range option like MBRP can still offer excellent performance at a lower price. Don’t forget to factor in installation costs and potential future replacements when evaluating value.
Frequently Asked Questions
Will a cat-back exhaust system improve my Mustang’s horsepower?
Yes, a well-designed cat-back exhaust can improve airflow, which may increase horsepower and torque slightly. However, the actual gains depend on the overall setup, including headers, intake, and tuning. Expect a modest boost rather than a dramatic increase unless paired with other modifications. For most owners, the primary benefit is a more aggressive sound and improved aesthetics.
Is it worth investing in a stainless steel exhaust system for my Mustang?
Investing in stainless steel, especially T304 grade, offers significant durability benefits, resisting rust and corrosion for years of use. While the initial cost is higher, it pays off over time by maintaining its appearance and performance. If you live in an area with harsh weather or road salt, a stainless steel system is a smarter long-term investment than aluminized steel or cheaper alternatives.
Can I install a cat-back exhaust myself, or do I need a professional?
Many cat-back systems are designed for DIY installation with basic tools, especially bolt-on models. However, some systems may require cutting or welding, which can be challenging without experience or proper equipment. If you’re unsure, hiring a professional ensures correct fitting and sealing, preventing leaks or rattles. Consider your mechanical skill level when choosing a system.
Will a louder exhaust system violate noise regulations or annoy neighbors?
Louder systems like Flowmaster are popular for their aggressive tone but can sometimes exceed local noise limits, especially at higher RPMs. It’s wise to check local ordinances before upgrading. Also, consider your daily driving environment; a more subdued tone might be better if you frequently drive in residential areas or have neighbors sensitive to noise.
How much should I expect to spend on a quality cat-back exhaust system for my Mustang?
Prices vary widely, with budget options starting around $300 and premium systems exceeding $1,000. Mid-range options like MBRP or Pypes tend to offer excellent value with reliable performance. Ultimately, spending more generally results in better materials, sound quality, and longevity, which can be worth the investment if you plan to keep your Mustang for years.
Conclusion
For most Mustang GT owners, the Flowmaster 17312 American Thunder stands out as the overall best due to its balance of aggressive sound, durability, and affordability. If you’re seeking a more refined, premium experience, the Borla 140135 offers excellent craftsmanship and a sophisticated tone. Budget-conscious buyers can consider the MBRP 99-04 for reliable performance without a high price tag. Beginners or those wanting an easy upgrade should prioritize bolt-on systems with straightforward installation. Meanwhile, enthusiasts focused on durability in harsh climates should opt for stainless steel options like Borla or MBRP for long-term peace of mind.
