Upgrading the axle-back exhaust on your 2025 BRZ is one of the most effective ways to personalize its character and sound. The factory exhaust is often tuned for quiet comfort, but a new system can provide a more aggressive tone that matches the car’s sporty intentions. This modification not only enhances the auditory experience but also adds a visual upgrade to the rear diffuser.
With numerous options available, from subtle refinements to bold statements, selecting the right exhaust can be challenging. Our roundup simplifies this process by highlighting nine of the best systems, focusing on build quality, sound profile, and visual appeal to help you make an informed decision for your vehicle.
Top Axle Back Exhaust Systems for Your BRZ
- BORLA 11839 Axle-Back Performance Exhaust System
- Burn Finish Axle Back Muffler Pipe Exhaust Tips
- Auto Dynasty J2 Engineering Axle Back Exhaust System
- Replacement STAINLESS STEEL Muffler Axle Back
- Axle Back Muffler Pipe Exhaust Tips
- Invidia Q300 Cat-Back Exhaust System
- MagnaFlow Street Series Cat-Back Exhaust System
- For 2022-Present BRZ Muffler Delete Axle Back
- GReddy Supreme SP Cat-Back Exhaust System
BORLA 11839 Axle-Back Performance Exhaust System
BORLA is a renowned name in the performance exhaust world, and the 11839 system lives up to that reputation. Constructed from premium T-304 stainless steel, this exhaust is built for longevity and resistance to corrosion. Its all-welded construction ensures a robust and leak-free assembly that can handle the rigors of daily driving and track use.
The system is designed for a straightforward bolt-on installation, making it a practical project for many enthusiasts. It provides a notable increase in exhaust note without being overly intrusive, offering a richer, more aggressive sound that complements the BRZ’s sporty nature.
Burn Finish Axle Back Muffler Pipe Exhaust Tips
For drivers seeking a specific aesthetic, this axle-back system features a distinctive burn finish on its stainless steel tips. This style offers a custom, high-performance look right out of the box. The 4.5-inch double-walled tips are designed for a premium appearance and durability.
With 2.50-inch outer diameter piping, this system is engineered to provide a smooth flow of exhaust gases. It serves as a direct replacement for the factory exhaust, focusing on enhancing the vehicle’s visual appeal with its aggressive tip design while offering a moderate change in exhaust sound.
Auto Dynasty J2 Engineering Axle Back Exhaust System
The Auto Dynasty J2 system is built with performance in mind, featuring a high-flow design intended to improve exhaust airflow. This can contribute to a more responsive feel from the engine. It is constructed from quality stainless steel and uses computerized mandrel-bends to maintain optimal exhaust flow throughout the system.
TIG welding and CNC machining during construction contribute to its strength and corrosion resistance. This exhaust aims to produce an attractive power sound, making your driving experience more engaging without being excessively loud during normal operation.
Replacement STAINLESS STEEL Muffler Axle Back
This replacement axle-back exhaust is a comprehensive kit that includes everything needed for installation. It comes with the exhaust itself, hangers, gaskets, and the necessary nuts and bolts. The anodized silver finish and 4.5-inch double-wall dual tips provide a clean, OEM-plus look for your BRZ.
Compatibility is a key feature, as this system is designed to fit a wide range of model years from 2012 to 2021. It represents a straightforward upgrade path for owners looking to refresh the rear end of their vehicle with a new, high-quality component.
Axle Back Muffler Pipe Exhaust Tips
Featuring a high-quality polished stainless steel finish, this axle-back system is built for a bright, lasting shine. The 4.50-inch slanted double-walled tips are a popular design choice that adds an aggressive and modern touch to the car’s rear profile. This visual upgrade is its primary focus.
The 2.50-inch outer diameter piping matches many other performance options, ensuring a proper fit and function. It’s a direct bolt-on solution for owners who want to enhance the look of their BRZ with a set of prominent, high-end exhaust tips.
Invidia Q300 Cat-Back Exhaust System
Invidia’s Q300 is a full cat-back system known for its refined and deep tone, making it an excellent choice for drivers who want a noticeable but not overwhelming sound increase. The system features a stainless steel rolled tip that offers a subtle and classy appearance.
With a piping diameter of 60mm, it is engineered to balance performance gains with daily driveability. This system is often praised for its build quality and its ability to provide a more mature sports car sound, reducing drone at highway speeds while still being engaging.
MagnaFlow Street Series Cat-Back Exhaust System
MagnaFlow’s Street Series is engineered to deliver the brand’s iconic, throaty exhaust note. This cat-back system is tuned to enhance the driving experience with a superior sound, both inside and outside the vehicle. It is the result of extensive dyno testing to confirm performance improvements through better flow dynamics.
Built in the USA with corrosion-resistant stainless steel and precision robotic construction, this system promises reliable performance for the life of your vehicle. It’s a comprehensive solution for those seeking a proven performance upgrade from a well-established manufacturer.
For 2022-Present BRZ Muffler Delete Axle Back
This is a specific solution for owners of the newest generation BRZ (2022-Present). As a muffler delete kit, its primary purpose is to significantly increase exhaust volume and reduce backpressure. It is constructed from T-304 stainless steel and comes with double-wall dual tips to maintain a finished look.
The kit includes all necessary hardware for installation. This option is for the driver who wants the most aggressive and loudest possible sound from a simple axle-back modification, prioritizing maximum auditory impact and potential performance from the deletion of the muffler.
GReddy Supreme SP Cat-Back Exhaust System
GReddy is a legendary brand in the import tuner scene, and the Supreme SP system is designed for the 2022+ BRZ platform. This cat-back exhaust is engineered to offer a balanced tone that is aggressive under acceleration but remains civilized during cruising. It represents a full-system upgrade from the catalytic converter back.
Expect high-quality materials and construction synonymous with the GReddy name. This system is an ideal choice for owners seeking a comprehensive exhaust upgrade from a top-tier manufacturer, aiming for both performance gains and a refined, powerful exhaust note.
Buying Guide: How to Choose an Axle Back Exhaust for Your 2025 BRZ
So, you’re thinking about upgrading the sound of your 2025 BRZ. An axle-back exhaust is a fantastic place to start. It’s one of the simplest modifications you can do, usually requiring no tune and taking less than an hour to install in your garage. But with so many options out there, how do you pick the right one? I’ve been through this process myself, and it really comes down to a few key factors: sound, build quality, looks, and your budget.
First and most importantly, consider the sound profile you’re after. Do you want a deep, mellow tone that won’t annoy your neighbors, or are you looking for a more aggressive, high-revving rasp that highlights the boxer engine’s unique character? Materials play a huge role here. An exhaust made with thicker, higher-grade stainless steel (like 304-grade) will not only last longer but also produce a cleaner, less tinny sound compared to cheaper alternatives. The design of the muffler and the tips also influences the volume and tone. If you want a louder setup, look for options with less restrictive muffler packing or straight-through designs.
Next, let’s talk about construction. I always recommend looking for a system that uses T304 or T409 stainless steel. It resists corrosion much better than aluminized steel, which is crucial if you live in an area that uses road salt. Check the quality of the welds in product photos; clean, consistent TIG welds are a sign of a well-made product. Also, pay attention to the gaskets and hardware included. A good axle-back kit will come with everything you need for a proper, leak-free installation.
Finally, think about aesthetics and fitment. The 2025 BRZ has a great rear end, and your new exhaust tips will be a central part of that look. Do you prefer single-wall polished tips, double-wall burnt titanium blue tips, or a more subdued black finish? Make sure the tip diameter and style complement the car’s lines. A quality exhaust from a reputable brand will be a direct bolt-on, designed specifically for the 2025 BRZ’s rear diffuser, with no cutting or modification required. When I was researching the 9 best axle back exhaust options for the 2025 BRZ, I found that the top contenders all shared these traits: excellent materials, a proven sound, and perfect fitment. Your choice ultimately depends on what kind of driving experience you want to create every time you start the car.
Frequently Asked Questions
What is the difference between an axle-back and a cat-back exhaust?
This is one of the most common questions, and it’s all about what parts you’re replacing. An axle-back exhaust replaces the muffler and the exhaust pipes from the rear axle backwards. It’s primarily for changing the sound and the look of your car’s rear end. A cat-back system is more comprehensive; it replaces everything from the catalytic converter back, including the mid-pipe. A cat-back can sometimes offer minor performance gains, but it’s also more expensive and complex to install. For most people who just want a better sound and appearance, an axle-back is the perfect and most cost-effective solution.
Will an axle-back exhaust void my car’s warranty?
Generally, no. Modifying the exhaust section after the catalytic converter typically does not affect your vehicle’s powertrain warranty. This is because an axle-back doesn’t change the engine’s air-fuel ratio or touch any emissions-critical components. However, it’s always a good idea to be informed. The Magnuson-Moss Warranty Act protects you, stating that a dealer must prove your modification caused a failure to deny a warranty claim. If you’re ever unsure, have a conversation with your dealership’s service department before you buy.
How difficult is it to install an axle-back exhaust myself?
It’s one of the easiest car mods you can do! If you have a basic set of hand tools, a jack, and jack stands, you can probably handle it in your driveway in under an hour. The process usually involves just unbolting the old exhaust from the mid-pipe connection, removing a couple of rubber hangers, and then reversing the steps to install the new one. Using a lubricant spray on the rubber hangers makes the process much smoother. There are also many helpful video tutorials online that can walk you through the specific process for the BRZ.
Are there any performance benefits to an axle-back exhaust?
Any performance gain from an axle-back alone is usually very minimal, often just a few horsepower at most. The main restriction in the exhaust system is typically further up, in the catalytic converters and the mid-pipe. The primary goal of an axle-back is to enhance the auditory and visual character of your car. You’re doing it for the glorious sound that comes from the 2.4L boxer engine, not for a significant power increase. If you’re looking for more substantial power gains, you’d need to look at a full cat-back or a header-back system, often accompanied by an engine tune.
What should I do if my new axle-back exhaust is too loud or has drone?
This can happen, especially if you go for a very aggressive, minimally-muffled option. The first thing I would check is for any exhaust leaks at the connection to the mid-pipe; even a small leak can make things much louder and sound raspy. If there’s no leak and the sound just isn’t for you, some companies sell silencers or baffles that can be inserted into the exhaust tips to reduce volume. If drone (a resonant booming sound at certain RPMs) is the issue, you can look into adding a small resonator to the mid-pipe, which is a separate project but can effectively cancel out those unpleasant frequencies.