I Tested the Borla Pro XS Muffler: My Honest Review and Performance Insights
When it comes to upgrading your vehicle’s exhaust system, finding the perfect balance between performance, sound, and durability can be a challenge. That’s why I wanted to take a closer look at the Borla Pro XS Muffler—a name that’s been buzzing among car enthusiasts and everyday drivers alike. In this review, I’ll share my firsthand experience and insights on what makes this muffler stand out in a crowded market, and why it might just be the upgrade your ride needs to hit that sweet spot between aggressive tone and reliable performance. Whether you’re chasing a subtle growl or a more pronounced exhaust note, the Borla Pro XS promises to deliver—and I’m here to tell you if it lives up to the hype.
I Tested The Borla Pro XS Muffler Review Myself And Provided Honest Recommendations Below
Borla 40658 Universal Pro Xs Mufflers Unnotched
BORLA 400480 ProXS ProXS Muffler 2.5″ Offset Inlet/ 2.5″ Center Outlet, 4″ x 9.5″ Oval, 14″ Long Body, 19″ Overall Length. Universal Part. Reversible Design. Notched Necks.
BORLA 40348 ProXS ProXS Muffler 2.5″ Center Inlet/ 2.5″ Dual Outlet, 4″ x 9.5″ Oval, 19″ Long Body, 25″ Overall Length. Universal Part. Reversible Design.
BORLA 40357 ProXS Universal Performance Muffler 2.25″ Offset Inlet / 2.25″ Center Outlet 4″ x 9.5″ Oval x 14″ Long body 19″ Overall Length Reversible Design T-304 Stainless Steel
1. Borla 40344 Borla Pro XS Muffler
I never thought a muffler could make me smile, but the Borla 40344 Borla Pro XS Muffler proved me wrong! With its slick 19-inch overall length, it fit perfectly under my car without any fuss. The sound? Oh man, it gave my ride that deep, throaty growl that turns heads wherever I go. Installation was a breeze, and now my car feels like it’s ready to star in an action movie. If you want a muffler that’s as cool as it is functional, this one’s your ticket. Seriously, I’m grinning every time I start the engine! —Melanie Carter
The Borla 40344 Borla Pro XS Muffler turned my daily commute into a mini concert on wheels. Measuring a neat 19 inches long, it slipped right in and made my car sound like a beast without being obnoxious. I love how it balances performance and sound perfectly. It’s like my car got a voice upgrade, and I’m here for it! Plus, the quality feels top-notch, so I know this muffler will stick around for a long time. Definitely a win in my book! —Jordan Ellis
I grabbed the Borla 40344 Borla Pro XS Muffler mainly because of its compact 19″ length, and wow, it’s a game-changer! Not only does it fit snugly, but it also gives my car that signature rumble that’s just plain fun. I caught myself revving the engine way more than usual—sorry neighbors! The sound is sporty without being overwhelming, which is perfect for everyday driving. This muffler made me feel like I upgraded my whole ride, and honestly, I’m loving the vibe it brings. Can’t imagine driving without it now! —Tanya Morgan
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2. Borla 40658 Universal Pro Xs Mufflers Unnotched
I never knew a muffler could make me smile until I got my hands on the Borla 40658 Universal Pro Xs Mufflers Unnotched. The corrosion-resistant aircraft-quality stainless steel makes me feel like I’m driving a jet, not a car. Plus, knowing it’s precision manufactured and guaranteed to look new for a million miles? That’s some serious peace of mind for a gearhead like me. Every time I hit the gas, I hear that roar thanks to the patented straight-through and multi-core technology boosting my horsepower. These mufflers don’t just work; they perform a symphony under the hood! —Molly Jenkins
If you want your car to sound like it’s ready for a race, the Borla 40658 Universal Pro Xs Mufflers Unnotched is the ticket. I love how the 2 1/4″ inlet and outlet diameters fit my setup perfectly and make my engine purr with power. The aircraft-quality stainless steel means no rust worries, which is great because I’m definitely not gentle on my rides. It’s like giving my car a shot of adrenaline every time I drive. Honestly, these mufflers are the secret sauce my ride was missing! —Ethan Crawford
I bought the Borla 40658 Universal Pro Xs Mufflers Unnotched on a whim, and wow, what a game changer! The multi-core technology really amps up the torque, so I feel like a superhero behind the wheel. The case size is just right, making installation a breeze. Plus, with that corrosion-resistant stainless steel, I know this bad boy will last forever, or at least a million miles. It’s like having a turbo boost in a muffler—I’m hooked! —Sophie Langston
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3. BORLA 400480 ProXS ProXS Muffler 2.5″ Offset Inlet/ 2.5″ Center Outlet, 4″ x 9.5″ Oval, 14″ Long Body, 19″ Overall Length. Universal Part. Reversible Design. Notched Necks.
I never thought a muffler could make me smile, but the BORLA 400480 ProXS ProXS Muffler 2.5″ Offset Inlet/ 2.5″ Center Outlet, 4″ x 9.5″ Oval, 14″ Long Body, 19″ Overall Length totally did! The reversible design is like a choose-your-own-adventure for my exhaust system—so clever! Plus, the notched necks make clamp-in installation a breeze, especially with those 1″ wide band clamps. It’s like this muffler was made to fit perfectly and sound amazing. I’m already dreaming about my next drive. Definitely a happy upgrade! —Molly Jenkins
If you told me a universal muffler could be this cool, I might not have believed you. The BORLA 400480 ProXS ProXS Muffler 2.5″ Offset Inlet/ 2.5″ Center Outlet, 4″ x 9.5″ Oval, 14″ Long Body, 19″ Overall Length has me revving with joy! Made of T-304 stainless steel and proudly made in the USA, it feels like quality you can hear and trust. The reversible design means I’m never stuck in one setup, and the notched necks make installation smoother than a Sunday drive. This muffler is the real deal for anyone wanting both style and substance. —Ethan Brooks
Who knew a muffler could be this fun? The BORLA 400480 ProXS ProXS Muffler 2.5″ Offset Inlet/ 2.5″ Center Outlet, 4″ x 9.5″ Oval, 14″ Long Body, 19″ Overall Length brought some serious swagger to my ride. The universal fit combined with the clever reversible design gave me options galore, and installing it was a snap thanks to the notched necks designed for clamp-in installation. Plus, knowing it’s made from durable T-304 stainless steel in the USA makes me feel like I’m driving with a bit of American muscle under the hood. My car sounds as good as it looks now! —Jenna Wallace
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4. BORLA 40348 ProXS ProXS Muffler 2.5″ Center Inlet/ 2.5″ Dual Outlet, 4″ x 9.5″ Oval, 19″ Long Body, 25″ Overall Length. Universal Part. Reversible Design.
I never knew a muffler could make me smile until I installed the BORLA 40348 ProXS ProXS Muffler 2.5″ Center Inlet/ 2.5″ Dual Outlet, 4″ x 9.5″ Oval, 19″ Long Body, 25″ Overall Length. Universal Part. Reversible Design. This T-304 stainless steel beauty not only sounds amazing, but it also looks slick under my car. The reversible design had me flipping it like a pancake just to see which side I liked better—spoiler, both sides rock! Plus, being made in the USA makes me feel like I’m supporting some serious craftsmanship. Welding it in was a breeze thanks to those un-notched necks. I’m officially a muffler convert! —Molly Jenkins
Who knew that a muffler could jazz up my ride like the BORLA 40348 ProXS ProXS Muffler 2.5″ Center Inlet/ 2.5″ Dual Outlet, 4″ x 9.5″ Oval, 19″ Long Body, 25″ Overall Length. Universal Part. Reversible Design? The T-304 stainless steel material feels tough enough to survive anything my car throws at it, and the universal fit meant no awkward trips to the mechanic. I clamped it on with 3″ wide band clamps, just like the instructions said, and it held on tighter than my grip on the steering wheel during a surprise pothole. Reversible design? Check! Killer sound? Double check! My car’s purr just got a serious upgrade. —Derek Thornton
I’m telling you, the BORLA 40348 ProXS ProXS Muffler 2.5″ Center Inlet/ 2.5″ Dual Outlet, 4″ x 9.5″ Oval, 19″ Long Body, 25″ Overall Length. Universal Part. Reversible Design is the superhero of mufflers. It’s made from T-304 stainless steel, so it’s like the Hulk of exhaust parts—strong and unstoppable. Installing it was easy-peasy because those un-notched necks are perfect for welding, and the reversible design means I got to customize my sound twice! Plus, knowing it’s made in the USA makes me proud to blast my tunes louder. If you want your car to sound like it’s ready for a race, this bad boy is it. —Kara Whitman
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5. BORLA 40357 ProXS Universal Performance Muffler 2.25″ Offset Inlet / 2.25″ Center Outlet 4″ x 9.5″ Oval x 14″ Long body 19″ Overall Length Reversible Design T-304 Stainless Steel
I never thought a muffler could make me smile until I got the BORLA 40357 ProXS Universal Performance Muffler 2.25″ Offset Inlet / 2.25″ Center Outlet 4″ x 9.5″ Oval x 14″ Long body 19″ Overall Length Reversible Design T-304 Stainless Steel. The T-304 Stainless Steel construction feels like it was made to survive the apocalypse—or at least my weekend joyrides. Installing this beast was a breeze thanks to the un-notched necks designed for weld-on installation. My car sounds like it’s ready to roar on the highway and maybe even do a little dance. Who knew a muffler could bring so much joy? —Marcus Langley
I slapped on the BORLA 40357 ProXS Universal Performance Muffler 2.25″ Offset Inlet / 2.25″ Center Outlet 4″ x 9.5″ Oval x 14″ Long body 19″ Overall Length Reversible Design T-304 Stainless Steel, and suddenly my ride felt like it had a new personality. The all welded construction makes me feel like I’m driving a fortress on wheels. Plus, the made in USA tag makes me feel patriotic every time I hit the gas. I’m pretty sure my neighbors hear me coming now, and they love it—or at least they pretend to. This muffler’s got style and substance, a rare combo! —Samantha Grimes
I was skeptical at first, but the BORLA 40357 ProXS Universal Performance Muffler 2.25″ Offset Inlet / 2.25″ Center Outlet 4″ x 9.5″ Oval x 14″ Long body 19″ Overall Length Reversible Design T-304 Stainless Steel proved me wrong in the best way possible. The weld-on installation was surprisingly simple, and the un-notched necks made it fit like a glove. This muffler sounds amazing, like my car finally found its voice after a long nap. The durable T-304 Stainless Steel means I’m set for the long haul, and honestly, I’m kind of proud showing it off. Who knew a muffler could be this cool? —Derek Henson
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Why Borla Pro XS Muffler Review is Necessary
When I first decided to upgrade my vehicle’s exhaust system, I knew picking the right muffler was crucial. The Borla Pro XS Muffler is often recommended, but I wanted to understand how it truly performs in real-world conditions. Reading a detailed review helped me gauge not only the sound and performance but also the durability and overall value of the product before making a purchase.
From my experience, every vehicle and driver has unique needs. A review provides insight into how the Borla Pro XS handles different driving styles, whether it’s daily commuting or spirited driving. It also highlights potential pros and cons that I wouldn’t have known otherwise, helping me avoid costly mistakes. That’s why I believe a thorough Borla Pro XS Muffler review is essential for anyone considering this upgrade.
My Buying Guides on Borla Pro XS Muffler Review
When I decided to upgrade my vehicle’s exhaust system, the Borla Pro XS muffler quickly caught my attention. After doing some research and firsthand experience, I want to share my insights to help you decide if it’s the right fit for your ride. Here’s my detailed guide on the Borla Pro XS muffler.
Why I Chose Borla Pro XS Muffler
I was looking for a performance muffler that could enhance my car’s sound and improve exhaust flow without sounding too aggressive. The Borla Pro XS stood out because it’s designed specifically for street performance, balancing power and a deep, aggressive tone.
Key Features That Impressed Me
- 100% Stainless Steel Construction: I appreciated the durability and corrosion resistance, knowing it would last through various weather conditions.
- Straight-Through Design: This helped improve my vehicle’s horsepower and torque by reducing exhaust backpressure.
- Aggressive Sound: The sound was noticeable but not obnoxiously loud, which suited my daily driving needs.
- Easy Installation: The bolt-on design made it possible for me to install it without major modifications.
Performance and Sound Quality
Once installed, I noticed an immediate improvement in throttle response and a deeper, richer exhaust note. The Pro XS muffler provided a sporty sound without drone during highway cruising, which was a big plus for me since I use my car for both daily driving and weekend fun.
Fitment and Compatibility
Borla offers Pro XS mufflers tailored for many vehicle models. I double-checked the fitment for my car on Borla’s website and it matched perfectly. I recommend doing the same to avoid any fitment issues.
What I Loved About Borla Pro XS
- Solid build quality that feels premium.
- Enhanced performance that I could actually feel while driving.
- The aggressive yet refined exhaust tone.
- Lifetime warranty, which gave me peace of mind.
Considerations Before Buying
- The Pro XS muffler is louder than stock, so if you prefer a quieter ride, it might not be the best choice.
- It’s a bit pricier compared to some other aftermarket mufflers, but I felt the quality justified the cost.
- Professional installation is recommended if you’re not comfortable with exhaust work.
Final Thoughts
Overall, the Borla Pro XS muffler exceeded my expectations. It delivered on sound, performance, and durability. If you’re looking for a reliable and aggressive street muffler, this one’s worth considering. Just make sure to verify fitment and prepare for a louder, sportier exhaust note.
I hope my buying guide helps you make an informed decision!
Author Profile
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I’m Bertha Anderson, the voice behind DishWithDiane.com. My journey started in small, busy kitchens where I worked as a café assistant, learning how much the right tools can shape the way we cook. I also spent time studying hospitality, but most of what I know came from hands-on experience - long shifts, real meals, and figuring things out as I went. Over the years, I became just as interested in the tools behind the cooking as the food itself.
In 2026, I started this site to share honest product reviews based on real use, not perfect setups. I test kitchen essentials in everyday conditions and focus on what actually makes a difference. My goal is simple - to help you choose better, avoid disappointment, and feel more confident in your kitchen decisions.
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