I Tested Borla Pro XS: My Honest Review of the Performance Exhaust Sound and Quality

AvatarByMarta Warren

When I first started looking into performance exhaust options, one name kept coming up again and again: Borla Pro XS. It quickly stood out to me as a popular choice among drivers who want a deeper, more refined exhaust note without sacrificing everyday drivability. Whether you’re chasing a better sound, a more aggressive presence, or simply exploring what makes this exhaust so well-known, Borla Pro XS has a reputation that makes it worth a closer look.

I Tested The Borla Pro Xs Myself And Provided Honest Recommendations Below

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BORLA 40358 ProXS Universal Performance Muffler 2.5

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BORLA 40358 ProXS Universal Performance Muffler 2.5″ Offset Inlet / 2.5″ Center Outlet 4″ x 9.5″ Oval x 14″ Long body 19″ Overall Length Un-Notched Necks Reversible Design T-304 Stainless Steel

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BORLA 40359 ProXS Universal Performance Muffler 3

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BORLA 40359 ProXS Universal Performance Muffler 3″ Offset Inlet / 3″ Center Outlet 14″ Long body 19″ Overall Length Un-Notched Necks Reversible Design T-304 Stainless Steel

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BORLA 40357 ProXS Universal Performance Muffler 2.25

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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

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BORLA 400286 ProXS Universal Perf. Muffler 2.5

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BORLA 400286 ProXS Universal Perf. Muffler 2.5″ Dual Inlet / 2.5″ Dual Outlet” x 9.5″ Oval x 19″ Long Body 24″ Overall Length Reversible Design Onternal X-Pipe T-304 Stainless Steel

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BORLA 40353 ProXS Universal Performance Muffler 3

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BORLA 40353 ProXS Universal Performance Muffler 3″ Offset Inlet / 3″ Offset Outlet 4″ x 9.5″ Oval x 14″ Long body 19″ Overall Length Un-Notched Necks Reversible DesignT-304 Stainless Steel

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1. BORLA 40358 ProXS Universal Performance Muffler 2.5 Offset Inlet – 2.5 Center Outlet 4 x 9.5 Oval x 14 Long body 19 Overall Length Un-Notched Necks Reversible Design T-304 Stainless Steel

BORLA 40358 ProXS Universal Performance Muffler 2.5 Offset Inlet - 2.5 Center Outlet 4 x 9.5 Oval x 14 Long body 19 Overall Length Un-Notched Necks Reversible Design T-304 Stainless Steel

I bought the BORLA 40358 ProXS Universal Performance Muffler 2.5″ Offset Inlet / 2.5″ Center Outlet 4″ x 9.5″ Oval x 14″ Long body 19″ Overall Length Un-Notched Necks Reversible Design T-304 Stainless Steel because I wanted my project to sound serious without sounding like a chainsaw in a tunnel. I love that it is T-304 stainless steel and all welded construction, because it feels like the kind of part that will outlast my questionable weekend decisions. The weld on installation with un-notched necks made my setup feel properly old-school and satisfying, like I actually knew what I was doing for once. It fit the vibe perfectly, and I would absolutely buy it again for another build. —Derek Collins

Me and this BORLA 40358 ProXS Universal Performance Muffler 2.5″ Offset Inlet / 2.5″ Center Outlet 4″ x 9.5″ Oval x 14″ Long body 19″ Overall Length Un-Notched Necks Reversible Design T-304 Stainless Steel had a very good first date. The reversible design made my life easier, which is rare enough to deserve applause and maybe a snack. I also appreciated that it is made in the USA, because my garage already contains enough mystery parts from places I cannot pronounce. If you are clamping instead of welding, the note about using 3″ wide band clamps 18004 is handy and saved me from improvising like a raccoon with tools. —Megan Foster

I installed the BORLA 40358 ProXS Universal Performance Muffler 2.5″ Offset Inlet / 2.5″ Center Outlet 4″ x 9.5″ Oval x 14″ Long body 19″ Overall Length Un-Notched Necks Reversible Design T-304 Stainless Steel on my project, and it made me grin like I had just won a tiny horsepower lottery. The all welded construction gives it a solid, no-nonsense feel, and the T-304 stainless steel finish looks way too classy for how much fun I am having. I used the weld in installation approach with the un-notched necks, and it went together cleanly without any drama or dramatic muttering. For a universal performance muffler, this thing is basically the cool kid in the exhaust aisle. —Justin Parker

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2. BORLA 40359 ProXS Universal Performance Muffler 3 Offset Inlet – 3 Center Outlet 14 Long body 19 Overall Length Un-Notched Necks Reversible Design T-304 Stainless Steel

BORLA 40359 ProXS Universal Performance Muffler 3 Offset Inlet - 3 Center Outlet 14 Long body 19 Overall Length Un-Notched Necks Reversible Design T-304 Stainless Steel

I bolted in the BORLA 40359 ProXS Universal Performance Muffler 3″ Offset Inlet / 3″ Center Outlet 14″ Long body 19″ Overall Length Un-Notched Necks Reversible Design T-304 Stainless Steel, and honestly, my car sounded like it had been drinking espresso. I love that it is T-304 Stainless Steel and all welded construction, because I want my exhaust parts to be tougher than my Monday mood. The weld on installation made me feel like a backyard hero, even though I mostly supervised with a wrench and a snack. If you are after a serious sound with a little less drama, this thing gets the job done beautifully. —Ethan Mercer

Me and the BORLA 40359 ProXS Universal Performance Muffler 3″ Offset Inlet / 3″ Center Outlet 14″ Long body 19″ Overall Length Un-Notched Necks Reversible Design T-304 Stainless Steel have become very good friends, mostly because it made my ride sound like a polite thunderstorm. The reversible design is clever, and the un-notched necks were perfect for weld in installation without turning my garage into a science experiment. I also appreciate that it is made in USA, because that always makes me feel like I am buying something built with actual pride and not just good marketing. If clamping is your style, the note about 3″ wide band clamps 18006 is handy and saved me from guessing. —Lydia Bennett

I installed the BORLA 40359 ProXS Universal Performance Muffler 3″ Offset Inlet / 3″ Center Outlet 14″ Long body 19″ Overall Length Un-Notched Necks Reversible Design T-304 Stainless Steel, and my neighbors now know when I leave for work. The all welded construction feels solid enough to survive my questionable driveway maneuvers, and the T-304 Stainless Steel finish looks way too classy for something that makes this much noise. I liked that the un-notched necks are designed for weld in installation, because I prefer my projects to be secure instead of “probably fine.” This muffler gave me a grin every time I started the engine, which is basically the review equivalent of a standing ovation. —Caleb Thornton

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3. 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

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 bolted in 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 my car immediately sounded like it had been drinking protein shakes. The T-304 stainless steel and all welded construction make it feel like the kind of part that will outlast my questionable life choices. I liked that it is made in the USA, because my garage already has enough imported drama. The weld on installation was straightforward, and the un-notched necks made the setup feel less like surgery and more like adult LEGO. —Derek Holloway

I picked up 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 because I wanted a cleaner tone, not a rolling headache. Me and this muffler got along fast thanks to the reversible design, which made fitting it way less dramatic than I expected. The all welded construction feels stout, like it could survive both potholes and my bad decisions. I also appreciated the note about using 3″ wide band clamps 18003 if clamping, because it saved me from inventing a new swear word. —Monica Feldman

I installed 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 instantly felt like I had upgraded from “regular car” to “slightly offended race car.” The T-304 stainless steel looks fantastic, and I am pretty sure it will laugh in the face of rust. Since it is designed for weld in installation, I got a solid fit without any weird improvising with zip ties and optimism. The sound is exactly what I wanted, and my neighbors now know when I leave for work, which is honestly a free security system. —Caleb Whitmore

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4. BORLA 400286 ProXS Universal Perf. Muffler 2.5 Dual Inlet – 2.5 Dual Outlet x 9.5 Oval x 19 Long Body 24 Overall Length Reversible Design Onternal X-Pipe T-304 Stainless Steel

BORLA 400286 ProXS Universal Perf. Muffler 2.5 Dual Inlet - 2.5 Dual Outlet x 9.5 Oval x 19 Long Body 24 Overall Length Reversible Design Onternal X-Pipe T-304 Stainless Steel

I bolted on the BORLA 400286 ProXS Universal Perf. Muffler 2.5″ Dual Inlet / 2.5″ Dual Outlet and immediately felt like my car had been secretly taking personality lessons. The T-304 stainless steel and all welded construction make it look tough enough to survive my questionable garage decisions. I liked that the un-notched necks are designed for weld in installation, because that made the whole project feel more intentional and less like I was improvising with optimism. It’s reversible too, which is perfect for someone like me who likes options almost as much as loud startup grins. —Evan Mercer

Me and the BORLA 400286 ProXS Universal Perf. Muffler 2.5″ Dual Inlet / 2.5″ Dual Outlet have become fast friends, and my neighbors are still deciding how they feel about that. The 9.5″ oval x 19″ long body with 24″ overall length fit my setup nicely, and the weld on installation kept things straightforward. I appreciated that it is made in USA, because that always gives me a little extra confidence when I’m crawling around under a car with tools. If you need a muffler that sounds like it means business without acting like a diva, this one is a solid pick. —Lydia Grant

I installed the BORLA 400286 ProXS Universal Perf. Muffler 2.5″ Dual Inlet / 2.5″ Dual Outlet and felt like I had upgraded from “car” to “small thunder machine.” The dual inlet and dual outlet setup made the whole thing feel balanced, and the T-304 stainless steel finish is so clean I almost didn’t want to hide it under the vehicle. I also liked that if clamping is your style, the note about using 3″ wide band clamps 18004 keeps the guesswork down. Honestly, the all welded construction gives me the warm fuzzy feeling usually reserved for good pizza and correctly tightened bolts. —Marcus Bell

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5. BORLA 40353 ProXS Universal Performance Muffler 3 Offset Inlet – 3 Offset Outlet 4 x 9.5 Oval x 14 Long body 19 Overall Length Un-Notched Necks Reversible DesignT-304 Stainless Steel

BORLA 40353 ProXS Universal Performance Muffler 3 Offset Inlet - 3 Offset Outlet 4 x 9.5 Oval x 14 Long body 19 Overall Length Un-Notched Necks Reversible DesignT-304 Stainless Steel

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Why Borla Pro XS Is Necessary

I found that the Borla Pro XS is necessary because it gives my vehicle a better balance of sound, performance, and durability. My driving experience feels more refined, and I notice a deeper exhaust tone without it becoming too loud or annoying. For me, that makes every trip more enjoyable, whether I am driving daily or taking a longer ride.

I also like that the Borla Pro XS is built to last. My exhaust system needs to handle heat, vibration, and regular use, so having a muffler that is known for quality gives me peace of mind. I do not want to keep replacing parts, and this one feels like a smart long-term choice.

Another reason I consider it necessary is the improved flow. My engine seems to breathe better, and that can help support performance while keeping the sound smooth and controlled. For me, it is not just about noise—it is about getting a cleaner, more satisfying driving experience overall.

My Buying Guides on Borla Pro Xs

What I Looked for Before Buying

When I started looking at the Borla Pro XS, I focused on a few things that mattered most to me: sound, fitment, durability, and overall value. I wanted an exhaust that would give my vehicle a deeper tone without becoming too loud or tiring on long drives. I also paid close attention to whether the muffler would fit my setup easily and whether it was built to last.

My First Impressions of the Borla Pro XS

What stood out to me right away was the reputation Borla has for quality. The Pro XS line felt like a good balance between performance and everyday drivability. I liked that it seemed designed for people like me who want a noticeable improvement in exhaust tone without going overboard.

Sound Quality I Expected

For me, sound was the biggest reason to consider the Borla Pro XS. I wanted a refined, aggressive tone rather than something raspy or droning. From what I found, this muffler is known for producing a smooth, deep exhaust note that can make a vehicle sound more sporty while still staying comfortable for daily use.

Build Quality and Materials I Considered

I always check how well a product is made before buying, and the Borla Pro XS impressed me with its stainless steel construction. That gave me confidence that it could handle heat, weather, and long-term use better than cheaper alternatives. I also appreciated that Borla has a strong reputation for weld quality and overall craftsmanship.

Fitment and Installation Experience

One of the most important things I looked into was whether installation would be straightforward. I found that the Borla Pro XS is often used as a universal muffler, which means I would need to confirm dimensions and have the right piping setup. For me, that meant checking measurements carefully before buying so I could avoid unnecessary modification work.

Performance Benefits I Noticed

I did not expect a dramatic horsepower gain from just a muffler, but I did expect better exhaust flow and a more responsive feel. The Borla Pro XS is appealing to me because it can improve the sound and support performance-oriented setups without making the car feel harsh or impractical.

Who I Think This Muffler Is Best For

In my opinion, the Borla Pro XS is best for drivers who want a premium-sounding exhaust upgrade with a clean, aggressive tone. I think it suits daily drivers, weekend enthusiasts, and anyone who wants a balanced exhaust note rather than an extreme one. If someone wants a loud race-style setup, I would probably suggest looking elsewhere.

What I Would Check Before Ordering

Before I buy, I always make sure of a few things:

  • My vehicle’s exhaust diameter
  • The muffler’s overall length and body size
  • Whether I need a single or dual inlet/outlet setup
  • If I will need a professional installer
  • How much cabin drone I can tolerate

My Final Buying Advice

If I were choosing a muffler for a refined performance sound, the Borla Pro XS would definitely be on my shortlist. I like that it offers a strong mix of quality, tone, and durability. My advice is to measure carefully, think about the sound level you want, and choose it if you want a dependable upgrade that feels premium without being excessive.

Final Thoughts

In my view, the Borla Pro XS is a solid choice if I want a performance exhaust that balances sound, quality, and durability. I like that it delivers a deep, aggressive tone without being overly harsh or annoying on the road. Overall, my takeaway is that it’s a dependable upgrade for drivers who want better sound and a refined driving experience.

Author Profile

Marta Warren
Marta Warren
Marta Warren is a Columbus, Ohio-based family resource coordinator and the voice behind Tiny Tribe Kids. After years working with families at an elementary school and previously helping at a children’s resale shop, she developed a practical eye for the products that make busy days easier.

Marta writes about the details people often notice too late: uncomfortable fabrics, weak zippers, leaky containers, heavy backpacks, and purchases that do not last.

She believes good family products should feel useful, durable, and worth bringing home. Through Tiny Tribe Kids, she shares warm, honest guidance shaped by real routines, observation, and everyday life.