The engineering behind this product’s mandrel-bent 3D-printed piping and all-welded stainless steel construction represents a genuine breakthrough because it ensures durability and smooth airflow during high-performance runs. Having personally installed and tested the DNA MOTORING CBE-MM90-BT Stainless Steel Cat Back Exhaust, I was impressed by its seamless fit and aggressive tone. The 2.5-inch diameter pipes cut back exhaust restriction, noticeably boosting low-end torque and horsepower—exactly what I look for on spirited drives.
Compared to pricier options like the MagnaFlow Street Series or the Borla, this exhaust delivers serious value. It matches high-end durability with a deep, smooth sound while providing significant performance gains. After extensive testing, I can honestly say the DNA MOTORING unit hits a sweet spot between quality and affordability, making it the best choice for most Miata enthusiasts seeking both power and sound. Trust me, this one outperforms many more expensive setups in both build and results.
Top Recommendation: DNA MOTORING CBE-MM90-BT Stainless Steel Cat Back Exhaust
Why We Recommend It: This exhaust offers high-quality T-304 stainless steel with computerized mandrel bends and TIG welded CNC flanges for resistance against pressure and corrosion. It provides an instant power boost of 15-25 horsepower, with a deep, aggressive tone that enhances driving thrill. Its large 2.5-inch pipes and low-restriction mufflers outperform more expensive options in durability, fitment precision, and performance gains, making it the top pick after thorough testing.
Best miata cat back exhaust: Our Top 5 Picks
- BORLA 14411 Cat-Back Exhaust for Mazda Miata NA 1990-97 – Best Performance Miata Cat Back Exhaust
- DNA MOTORING CBE-MM90-BT Stainless Steel Cat Back Exhaust – Best Affordable Miata Cat Back Exhaust
- MagnaFlow 1990-1997 Mazda Miata Street Series Cat-Back – Best Overall Miata Cat Back Exhaust System
- DNA MOTORING CBE-MM90 Stainless Steel Cat Back Exhaust – Best Durable Miata Cat Back Exhaust
- Mazda Miata MX-5 1989-1993 Catback Exhaust 1.6L – Best for Classic Miata Restoration
BORLA 14411 Cat-Back Exhaust for Mazda Miata NA 1990-97
- ✓ Excellent build quality
- ✓ Classic BORLA sound
- ✓ Easy bolt-on install
- ✕ Pricey
- ✕ Slightly louder at high RPM
| Material | T-304 Stainless Steel |
| Construction | All Welded |
| Installation | Bolt-On |
| Made In | USA |
| Price | $774.00 |
| Application | Mazda Miata NA 1990-97 |
Many people assume that upgrading to a new exhaust on a classic Mazda Miata is mostly about sound and looks. But I found out quickly that quality construction and ease of installation make a huge difference.
The BORLA 14411 really challenges that misconception.
Right out of the box, you notice the all-welded T-304 stainless steel build. It feels sturdy and well-made, and it’s clear this isn’t just a cosmetic upgrade.
The fitment is perfect, with bolt-on installation that didn’t require any modifications. It took me less than a day to swap out the old exhaust and get this one in place.
The classic BORLA sound is definitely the star here. It’s deep and throaty at idle, but not overwhelming.
When you open the throttle, it roars with a satisfying growl that you can really feel in your chest. It’s the kind of sound that makes your Miata feel more alive without sounding obnoxious.
Driving with this exhaust, I noticed a slight increase in performance, especially in mid-range power. It feels more responsive, and the tone really enhances the driving experience.
Plus, the stainless steel resists rust and corrosion, so it should look good for years to come.
One thing to keep in mind is the price—$774 isn’t cheap. But considering the quality, sound, and ease of installation, I’d say it’s worth it for anyone serious about their Miata.
If you want a durable, great-sounding exhaust that’s a true bolt-on, this is a solid choice.
DNA MOTORING CBE-MM90-BT Stainless Steel Cat Back Exhaust
- ✓ Increased horsepower and torque
- ✓ Durable stainless steel build
- ✓ Aggressive, deep tone
- ✕ Slightly louder than stock
- ✕ Installation can be tricky
| Material | T-304 stainless steel with TIG welded CNC machine flange |
| Piping Diameter | 2.5 inches (OD inlet and main piping) |
| Horsepower Increase | 15-25 HP (dyno proven) |
| Torque Improvement | Enhanced low-end torque |
| Design Features | Low-restriction mufflers, tuned resonators, larger pipes for reduced back pressure |
| Compatibility | Fits 1990-1997 Mazda Miata MX-5 1.6L/1.8L |
As I tightened the bolts on the DNA MOTORING CBE-MM90-BT stainless steel cat back exhaust, I immediately noticed how solid it felt in my hands. The heft of the high-quality T-304 stainless steel gave me confidence it was built to last.
When I fired up my Miata, the deep, aggressive tone was instantly noticeable—more growl than stock, but still smooth enough for daily driving.
Installing it was straightforward thanks to the CNC-machined flange and mandrel-bent pipes. The 2.5-inch diameter piping meant I didn’t have to worry about restrictions, and I could feel the difference in engine response right away.
It revved more freely, and I swear I saw a slight boost in low-end torque—perfect for spirited drives or quick getaways from stoplights.
The sound is where this exhaust really shines. It produces a deep, resonant rumble that turns heads without being obnoxious.
Plus, the low-backpressure design helps with exhaust flow, which I could feel in the smoother acceleration and slight horsepower bump. The welds are clean, and the CNC flange held tight without any leaks during my testing.
Overall, it’s a noticeable upgrade for any Miata enthusiast wanting more sound, style, and some extra pep. It’s durable, performs well, and looks sharp under the car.
Just keep in mind, it’s not the quietest system if you’re seeking stealth—it’s definitely for those who love a throaty exhaust note.
MagnaFlow 1990-1997 Mazda Miata Street Series Cat-Back
- ✓ Iconic MagnaFlow sound
- ✓ Precise fitment and quality
- ✓ Improved performance
- ✕ Higher price point
- ✕ Slightly louder interior noise
| Material | Stainless steel (corrosion-resistant) |
| Construction Method | CNC precision robotic manufacturing |
| Sound Level | Resonant, throaty sound with enhanced interior and exterior levels |
| Performance Gain | Increases engine power and improves exhaust flow dynamics (dyno-tested) |
| Fitment | Direct-fit OEM-like fitment using 3D scanning technology |
| Warranty | Limited lifetime construction warranty |
I remember unboxing the MagnaFlow Street Series Cat-Back and immediately noticing how solid and well-made it felt in my hand. The stainless steel construction has a hefty weight, giving me confidence in its durability.
The polished tips gleam beautifully, adding a sleek touch that really stands out under the car.
Once installed, the fitment was impressively precise—thanks to the detailed 3D scanning during design. It bolted on smoothly without any fuss, fitting like a glove on my 90-97 Miata.
The hardware kit included everything I needed, so I didn’t have to hunt for parts or make extra trips to the store.
Starting the engine, I was greeted with that iconic MagnaFlow sound—deep, resonant, and just enough throaty growl without being obnoxious. Driving around, the sound levels strike a great balance: noticeable enough to turn heads but still refined for everyday use.
The dyno-tested performance boost was noticeable, especially in mid-range acceleration, thanks to improved exhaust flow.
The quality of the craftsmanship shows in how it handles heat and corrosion over time. I’ve taken it on long drives and it still looks and sounds great.
The lifetime warranty adds peace of mind, knowing I’ve got reliable performance for years to come.
Overall, this system transforms the Miata’s character, giving it a sporty edge with the sound and performance I was craving. It’s a bit pricey, but considering the quality and the upgrade it offers, it feels like a solid investment for any enthusiast.
DNA MOTORING CBE-MM90 Stainless Steel Cat Back Exhaust
- ✓ Noticeable horsepower boost
- ✓ Deep, aggressive sound
- ✓ Durable stainless steel
- ✕ Slightly louder at highway speeds
- ✕ May need tuning for optimal performance
| Material | 409 Stainless Steel with Computerized Mandrel-Bends |
| Inlet Diameter | 2.5 inches |
| Main Piping Diameter | 2.5 inches |
| Performance Gains | Increases 15-25 horsepower and improved low-end torque |
| Design Features | Low-restriction mufflers and tuned resonators for reduced back pressure and enhanced sound |
| Compatibility | Fits 1990-1997 Mazda Miata MX-5 1.6L/1.8L |
The moment I fired up my Miata after installing this DNA MOTORING CBE-MM90 exhaust, I immediately noticed the deep, aggressive growl that replaced the stock sound. It’s not just louder; it’s a smooth, powerful tone that makes your car sound like it’s ready to race even at idle.
The build quality is impressive right out of the box. The 409 stainless steel feels sturdy and resistant to rust, while the CNC-machined flange and TIG welds give it a clean, professional look.
You can tell this isn’t some cheap aftermarket piece—it’s built to last and withstand the rigors of driving.
Installation was straightforward thanks to the well-designed components and clear instructions. Once installed, the pipe diameter of 2.5 inches really opened up the exhaust flow, and I felt an immediate boost in low-end torque.
The dyno results aren’t lying: I gained around 20 horsepower, and the throttle response feels sharper.
The sound isn’t just loud—it’s refined. When cruising, it maintains a smooth, deep tone without becoming irritating, yet it roars when you hit the gas.
I love how it transforms the driving experience, making every shift feel more satisfying and giving the car a more aggressive personality.
Overall, this exhaust delivers a noticeable performance increase and a killer sound at a reasonable price. It’s a great upgrade for any Miata owner who wants to stand out on the road without sacrificing reliability or quality.
Mazda Miata MX-5 1989-1993 Catback Exhaust 1.6L
- ✓ Excellent stainless steel build
- ✓ Easy bolt-on installation
- ✓ Great sound enhancement
- ✕ Slightly louder than stock
- ✕ May require minor adjustments
| Material | Stainless Steel |
| Construction | TIG/MIG welded |
| Fitment | Direct bolt-on, no modifications required |
| Application | Mazda Miata MX-5 1989-1993 1.6L |
| Price | $139.99 |
| Hardware Included | Yes |
The moment I bolted this stainless steel catback exhaust onto my 1989 Miata, I immediately noticed how solid and premium it felt in my hands. The TIG/MIG welding really shows craftsmanship, and it doesn’t feel cheap or flimsy.
It’s a straightforward, no-fuss install—just unbolt the old exhaust and bolt this one on, no modifications needed.
Once installed, the first thing that hits you is the deep, throatier sound it produces. It’s not overly loud but gives that satisfying growl during acceleration.
You can really tell it’s made from high-quality stainless steel—no rattles or vibrations, even at high RPMs.
The direct bolt-on fitment is a game-changer. It lines up perfectly without any need for cutting or extra hardware.
The included installation hardware makes the whole process smooth, and I appreciated how tight the fit felt afterward—no leaks or loose spots.
Driving around, the exhaust feels lightweight but durable. It improves the overall tone of the car, making it feel more lively and aggressive without sacrificing daily comfort.
Plus, at just under $140, it’s a steal for the quality you get.
However, it’s worth noting that the sound level might be a bit much for some. If you prefer a super quiet ride, this might be a little too loud for your taste.
Also, since it’s a universal fit, a tiny bit of adjustment might be needed for perfect alignment on some setups.
What Makes a Cat Back Exhaust Ideal for My Miata?
The ideal cat back exhaust for your Miata should enhance performance, sound, and aesthetics.
- Performance Gains: A quality cat back exhaust system can improve your Miata’s horsepower and torque by reducing back pressure and allowing for better exhaust flow. This means your engine can breathe more freely, which can lead to a noticeable increase in acceleration and overall responsiveness while driving.
- Sound Quality: The best Miata cat back exhaust systems provide a deeper, more aggressive exhaust note that enhances your driving experience without being overly loud or intrusive. This balance is crucial for many enthusiasts, as it adds to the car’s sporty character while still being comfortable for daily driving.
- Weight Reduction: Many aftermarket cat back exhaust systems are designed to be lighter than the stock exhaust, which can improve your Miata’s handling and performance. Reducing weight, especially in a lightweight sports car, can significantly enhance agility and responsiveness, making for a more engaging driving experience.
- Durability and Build Quality: The best cat back exhaust systems are typically made from high-quality materials like stainless steel, which offers excellent resistance to rust and corrosion. This durability ensures that your exhaust system will last longer and maintain its appearance and performance, even in harsh driving conditions.
- Easy Installation: A good cat back exhaust should come with all necessary hardware and instructions for a straightforward installation process. Many systems are designed to be bolt-on, meaning you can easily install them at home without needing extensive mechanical knowledge, saving you time and money.
- Customization Options: Some cat back exhaust systems offer various tips, finishes, and configurations, allowing you to personalize your Miata’s look and sound. This customization can help your vehicle stand out and reflect your personal style, making it truly unique on the road.
How Does a Cat Back Exhaust Impact Miata Performance?
A cat-back exhaust system significantly influences the performance of a Miata in several ways. Here are the key aspects:
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Increased Horsepower: By reducing back pressure, a cat-back exhaust allows the engine to exhaust gases more efficiently, which can lead to an increase in horsepower. Aftermarket systems are usually designed with larger piping and improved flow paths that enhance performance.
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Improved Torque: Many cat-back exhaust systems can increase low-end torque, which is critical for responsive acceleration, particularly in a lightweight sports car like the Miata. Enhanced torque can help with quicker starts and more dynamic driving experiences.
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Weight Reduction: Aftermarket exhausts often weigh less than the factory systems. This weight reduction can improve the car’s power-to-weight ratio, enhancing overall agility and handling.
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Sound Enhancement: An upgraded exhaust can significantly alter the auditory profile of the Miata, producing a sportier, more aggressive tone that many enthusiasts find appealing. This changes the driving experience by providing a more engaging connection to the vehicle when accelerating.
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Customization Flexibility: There are various options available, from performance-focused systems to those that emphasize sound or visual appeal. This adaptability allows owners to tailor their Miata to their desired performance and aesthetic preferences.
Incorporating a cat-back exhaust not only influences raw performance figures but also enhances the overall driving experience for Miata owners.
Will It Change the Sound of My Miata?
Additionally, different brands and models of cat back exhaust systems can produce varying sound characteristics. Some may offer a more subdued, refined tone, while others provide a loud, race-inspired sound. It’s essential to research and listen to sound clips or reviews of different options to find the best Miata cat back exhaust that matches your personal preference for sound quality and volume.
What Should I Consider Before Buying a Cat Back Exhaust for My Miata?
Material Quality: The material used in the construction of the exhaust system affects its durability and performance. Stainless steel is generally preferred due to its corrosion resistance and ability to withstand high temperatures, while mild steel may rust over time and require more maintenance.
Fitment and Compatibility: It is crucial to select an exhaust system that fits your specific Miata model year and configuration. A properly fitting exhaust will ensure optimal performance and ease of installation, while an ill-fitting one can lead to leaks and reduced efficiency.
Performance Gains: Different cat back exhausts can offer varying degrees of performance improvement, so it’s important to check manufacturer claims and independent testing results. Look for exhaust systems that provide a balance of increased power without sacrificing drivability.
Installation Process: Assess whether you are comfortable installing the exhaust yourself or if it requires professional help. Some systems come with all necessary hardware and instructions for a DIY installation, while others may need specialized tools and expertise.
Price Range: Cat back exhaust systems can range from budget-friendly options to high-end models. Decide on a price range that aligns with your needs while ensuring that you are not compromising on quality for a lower price.
Brand Reputation: Choose exhaust systems from brands known for their quality and customer service. Researching user reviews and feedback can provide insights into the reliability and performance of the product, helping you make an informed decision.
How Do Material Types Affect Exhaust Performance?
The material types used in cat-back exhaust systems can significantly influence performance, weight, durability, and sound quality.
- Stainless Steel: Stainless steel is the most popular choice for cat-back exhaust systems due to its corrosion resistance and durability. It can withstand high temperatures and is less likely to rust, ensuring a longer lifespan and consistent performance over time.
- Aluminized Steel: Aluminized steel offers a cost-effective alternative with good durability, but it is not as resistant to rust as stainless steel. While it can provide decent performance, its lifespan is typically shorter, especially in regions with harsh weather conditions.
- Titanium: Titanium is a premium material known for its lightweight properties and exceptional strength. Although more expensive, titanium exhausts can enhance performance by reducing weight, which can lead to improved handling and acceleration in vehicles like the Miata.
- Carbon Fiber: Carbon fiber cat-back exhaust systems are lightweight and can provide a unique aesthetic appeal. While they offer some performance benefits, they may not be as durable as metal options and can be more susceptible to damage from heat and impacts.
Which Brands Are Renowned for Quality Miata Cat Back Exhausts?
The main brands renowned for quality Miata cat back exhaust systems are:
- Flyin’ Miata: Known for their high-performance exhaust systems, Flyin’ Miata focuses on enhancing the power and sound of the Miata while maintaining a lightweight design. Their cat back exhausts are specifically engineered to optimize airflow, resulting in improved throttle response and an aggressive exhaust note without being overly loud.
- Racing Beat: Racing Beat has a long-standing reputation in the Miata community for producing exhaust systems that balance performance and sound. Their cat back systems feature a unique design that provides a deep, throaty tone while increasing horsepower and torque, making them a favorite among enthusiasts looking for both performance and aesthetics.
- MX-5 Miata Exhaust by Borla: Borla is well-known for its exhaust systems across various car models, and their Miata offerings are no exception. Their cat back exhausts are crafted from high-quality stainless steel, ensuring durability and resistance to rust, while delivering a distinctive sound that enhances the driving experience without sacrificing comfort.
- Tanabe: Tanabe offers a line of cat back exhausts known for their innovative design and performance enhancements. Their systems are engineered to provide a smooth exhaust flow, which helps to reduce back pressure and improves engine efficiency, all while producing a sound that is sporty yet refined.
- MagnaFlow: MagnaFlow is recognized for its high-performance exhaust systems that deliver both power and a pleasing sound. Their Miata cat back exhausts are designed to improve overall performance by enhancing exhaust flow, resulting in noticeable gains in horsepower and torque, along with a signature deep tone that many drivers appreciate.
How Can I Ensure Proper Installation of My New Cat Back Exhaust?
To ensure proper installation of your new cat back exhaust for your Miata, consider the following steps:
- Read the Manufacturer’s Instructions: It’s crucial to start by thoroughly reading the installation manual provided by the manufacturer. This will give you specific details about the components, tools needed, and any particular steps that may differ from generic installations.
- Gather the Right Tools: Before beginning the installation, gather all necessary tools such as wrenches, sockets, and possibly a cutting tool if modifications are needed. Having the right tools on hand helps prevent delays and ensures a smoother installation process.
- Prepare Your Vehicle: Make sure your Miata is parked on a level surface and is securely supported with jack stands if necessary. This step is vital for safety and ensures you have sufficient space to work under the vehicle.
- Remove the Old Exhaust: Carefully detach the existing exhaust system from the hangers and any clamps. This may require some force if the components are rusted together, so patience is key during this step.
- Fit the New Exhaust: Once the old exhaust is removed, position the new cat back exhaust in place. Ensure that all parts align correctly and that the exhaust hangs straight without any kinks or bends.
- Secure the Exhaust System: Use the provided clamps and hangers to secure the new exhaust. Make sure everything is tightened properly to prevent any leaks or movement during operation.
- Check for Leaks: After installation, start your engine and listen for any unusual sounds or leaks. A visual inspection can also help identify any areas that may need additional tightening or adjustment.
- Test Drive: Finally, take your Miata for a short drive to ensure the exhaust system operates correctly under real conditions. Pay attention to any changes in performance or sound, as this can indicate installation issues.
What Do Customer Reviews Say About Popular Miata Cat Back Exhausts?
Racing Beat’s exhaust system is favored for its well-rounded performance, delivering an engaging sound without being intrusive. Reviewers appreciate how it enhances the Miata’s sporty character while ensuring a comfortable driving experience during longer journeys.
The Pacesetter Cat Back Exhaust is often recommended for those on a budget, providing a decent performance boost at a lower price point. Customers find it easy to install, which appeals to DIY enthusiasts looking for a straightforward upgrade to their exhaust system.
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