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Short version: the Borla S-Type is the cat-back exhaust owners recommend when they want a serious, muscular sound backed by serious build quality. Reviewers repeatedly praise the deep growl under acceleration and the bulletproof T-304 stainless construction, and owners cite Borla's warranty as peace of mind — which is why it earns a spot in our best cat-back exhaust roundup. It is rated around 4.6 across thousands of reviews. Highway drone is a real and honest caveat, and the notes below matter, but for a premium aggressive exhaust it is one of the most trusted choices.
What the Borla S-Type Is
The S-Type is the middle of Borla's three-tier sound lineup — louder and more aggressive than the mild Touring line but not as extreme as the race-oriented ATAK. It is a cat-back system, meaning it replaces the exhaust from the catalytic converter back (mufflers, pipes and tips), so it is emissions-legal in most areas while transforming the sound and the look out back.
Borla builds it from T-304 austenitic stainless steel — the premium grade reviewers repeatedly single out for resisting rust far better than cheaper 409 stainless — and backs it with a million-mile warranty that owners cite constantly as a reason they paid up. It is a direct-fit, bolt-on design engineered for a specific vehicle, finished with polished tips. This is the enthusiast's sound-and-quality upgrade: it wakes up the exhaust note and is built to outlast the car.
Who It's For
If you want your car or truck to announce itself with a deep, purposeful growl — and you care that the system is built to last — the S-Type is aimed at you. Owners consistently describe it as the sweet spot: aggressive enough to satisfy under throttle, refined enough to drive every day, and made from stainless that will not rot out. Enthusiasts who value Borla's reputation and warranty land here again and again.
It is a poorer fit for two groups: buyers chasing maximum quiet (the milder Touring line suits them) and buyers chasing big horsepower numbers, since a cat-back's power gains are modest. It is also a premium purchase, so tight budgets may look elsewhere. Before you buy, read application-specific reviews for your exact model — drone varies by car. Start with the Performance Mods hub, and see the best cat-back exhaust roundup for how the S-Type compares.
What Owners Love
Across thousands of reviews, the praise is consistent:
- The sound. The number-one reason owners buy it. Reviewers repeatedly describe a deep, muscular growl under acceleration that delivers exactly the aggressive character they wanted.
- T-304 stainless build. Owners consistently praise the premium stainless construction and finish, contrasting it with cheaper systems that rust and thin out over time.
- The warranty. Borla's million-mile warranty comes up again and again as the reassurance that justifies the price.
- Fit and finish. The direct-fit design and polished tips draw steady praise, with owners appreciating that it looks factory-plus rather than tacked-on.
Common Complaints
An honest read of the reviews turns up a consistent set of gripes:
- Highway drone. The most important honest caveat. Some owners report noticeable cabin drone at cruising rpm, while others in the same car barely notice it. It is application-dependent, so research your exact model.
- Minimal power gain. A recurring realistic note: the horsepower increase from a cat-back alone is small. Owners buy it for sound and quality, not dyno numbers.
- Louder than some expected. A minority of buyers find the S-Type more aggressive than anticipated and wish they had chosen the milder Touring line.
- Fitment fiddliness. While direct-fit, some owners report needing to adjust hangers and tips for clean alignment and clearance during install.
- Price. It sits at the premium end. Owners who value the build and warranty accept it; budget buyers feel the pinch.
Alternatives Worth a Look
The S-Type is our premium aggressive-sound pick, but depending on what you want:
- Borla Touring — the quieter alternative. Same build quality and warranty with a milder, drone-free note for owners who want refinement over aggression.
- Borla ATAK — the loudest pick. Owners who want maximum volume step up from the S-Type to Borla's most aggressive tier.
- A value-brand cat-back — the budget route. Owners note cheaper systems save money but often use lower-grade steel and skip the long warranty.
For the full ranked comparison of these against the S-Type, see the best cat-back exhaust roundup, and browse the Performance Mods hub for intakes, tuners and other bolt-ons to build a coherent setup.
The Verdict
The Borla S-Type earns its standing as a benchmark aggressive cat-back. Owners consistently report that it delivers the deep, muscular growl they were after, that the T-304 stainless construction and million-mile warranty justify the premium, and that the direct-fit design and polished tips look and feel factory-plus. The honest trade-offs are real and worth respecting: some vehicles get noticeable highway drone, the power gain is modest, and it is a premium purchase — so read reviews for your exact model before buying. Match it to the right car, and you get an exhaust that sounds fantastic and is built to outlast the vehicle, which its ~4.6 rating across thousands of reviews reflects.
Recommended Options
Best for the best balance of aggressive sound and daily livability
- T-304 stainless, mandrel-bent, made in USA
- Aggressive tone without brutal cabin drone
- Patented straight-through, notched-tube design
- Borla Million Mile Warranty
Why buy it: the cat-back the enthusiast crowd keeps recommending — a genuinely aggressive note on throttle that still settles down at cruise, in bulletproof T-304 stainless with a lifetime warranty.
Best for a deeper note with the least highway drone
- Straight-through, mandrel-bent stainless
- Tuned for a mellow, refined tone
- Minimal cruise drone — road-trip friendly
- Lifetime limited warranty
Why buy it: the pick for owners who want a richer exhaust note but still take long highway drives — MagnaFlow’s Touring tuning is the go-to for keeping cabin drone to a minimum.
Best for the loudest, most aggressive street-legal note
- Borla’s loudest patented sound technology
- T-304 stainless mandrel-bent construction
- Race-bred straight-through flow
- Million Mile Warranty
Why buy it: for owners who want maximum attitude — Borla’s most aggressive tuning delivers the wide-open race note enthusiasts chase, while staying a bolt-on cat-back that keeps your cats intact.
Best for a quality stainless cat-back for less money
- Deep, aggressive Street Series tone
- Mandrel-bent stainless, polished tips
- Bolt-on fit, no welding
- Lifetime limited warranty
Why buy it: the value sweet spot — a proper mandrel-bent stainless MagnaFlow with a deeper, more aggressive note than the Touring, at a price that undercuts the premium systems.
Best for a subtle upgrade you won’t regret on a commute
- Borla’s mildest, most refined tuning
- T-304 stainless mandrel-bent tubing
- Smooth power delivery, quiet cruise
- Million Mile Warranty
Why buy it: the smart choice if you want better sound and flow but hate drone — Borla’s Touring tune is the quietest in the lineup, perfect for a daily driver or a shared garage.
Prices are pulled from Amazon and were accurate as of Aug 22, 2026, 7:14 PM EDT. Product prices and availability are subject to change — the live price is shown on Amazon.