Top 10 Best 9th Gen Civic Si Exhaust Systems Reviewed
The best 9th gen Civic Si exhaust options significantly impact your vehicle’s performance and auditory experience. With advancements in muffler design, piping materials, and sound tuning technologies, these exhaust systems offer a blend of power enhancement, efficiency gains, and superior acoustics. Choosing the right exhaust can also influence backpressure levels and overall engine responsiveness, making it essential to understand the latest innovations in catalytic converters and stainless steel construction.
Close keyword variations like performance exhaust systems and aftermarket mufflers highlight the critical role of tailored exhaust upgrades for enthusiasts seeking both reliability and aggressive tone. As you explore the best 9th gen Civic Si exhaust selections, consider how these systems address common challenges such as corrosion resistance and installation ease to optimize your driving dynamics.
Dive deeper to uncover the technology and features setting these exhausts apart.
best 9th gen civic si exhaust: Top Picks for 2026
| Image | Product | Buy |
|---|---|---|
Top Picks- 1  | BORLA 11828 Axle-Back Performance Exhaust System for 2012-2015 Honda Civic Best for: Performance enthusiasts | Check Price On Amazon |
Top Picks- 2  | DNA MOTORING CBE-HC06SI Stainless Steel Cat Back Exhaust System [Compatible Best for: Stainless steel durability | Check Price On Amazon |
Top Picks- 3  | Invidia (HS06HC2STT) N1 Titanium Tip Cat-Back Exhaust System for Honda Best for: Lightweight titanium style | Check Price On Amazon |
Top Picks- 4  | Invidia (HS12HC2STT) N1 Titanium Tip Cat-Back Exhaust System for Honda Best for: Upgraded titanium sound | Check Price On Amazon |
Top Picks- 5  | DNA MOTORING CBE-HC922-NRT Stainless Steel Cat Back Exhaust System [Compatible Best for: Durable stainless cat-back | Check Price On Amazon |
1. BORLA 11828 Axle-Back Performance Exhaust System for 2012-2015 Honda Civic
Best for: Ideal for 2012-2015 Civic Si owners.
Constructed from T-304 stainless steel, the BORLA 11828 Axle-Back Performance Exhaust System allows direct bolt-on installation without modifications, giving drivers a hassle-free upgrade experience that enhances exhaust durability and sound quality.
With all welded construction and a lightweight 5-pound design, this axle-back system ensures strength and corrosion resistance while minimizing added weight. Made in the USA, it carries a manufacturer warranty for peace of mind, ensuring reliable performance over time.
Pros
- T-304 stainless steel for corrosion resistance
- Bolt-on installation simplifies upgrade process
- All welded construction enhances durability
- Lightweight design at only 5 pounds
Cons
- Limited to axle-back configuration; does not include full cat-back system
This exhaust suits 2012-2015 Civic Si owners seeking a straightforward, durable axle-back upgrade that boosts sound and longevity without complicated installation.
2. DNA MOTORING CBE-HC06SI Stainless Steel Cat Back Exhaust System [Compatible
Best for: Great for 2006-2011 Civic Si Coupe.
Manufactured from high-quality T-304 stainless steel with computerized mandrel bends, the DNA MOTORING CBE-HC06SI Cat Back Exhaust offers strength and optimized exhaust flow, supporting increases in horsepower and torque for spirited driving.
This system weighs 22.4 pounds and features TIG welded CNC machine flanges ensuring pressure resistance and corrosion protection. Its polished exterior delivers aggressive, deep tones while maintaining smooth gas flow and improved engine efficiency.
Pros
- T-304 stainless steel for long-term durability
- Mandrel bends optimize exhaust flow
- TIG welded CNC flanges resist pressure and corrosion
- Dyno-proven horsepower and torque gains
Cons
- Relatively heavier system at 22.4 pounds impacts overall weight
Perfect for 2006-2011 Civic Si Coupe drivers wanting a robust cat-back exhaust that delivers noticeable power gains with a deep, aggressive tone.
3. Invidia (HS06HC2STT) N1 Titanium Tip Cat-Back Exhaust System for Honda
Best for: Top choice for 2006-2011 Civic Si with style.
Featuring a 76mm (3″) pipe and large 101mm (4″) titanium tip, the Invidia HS06HC2STT Cat-Back Exhaust offers excellent exhaust flow and a unique premium aesthetic thanks to its high-quality SUS304 stainless steel construction.
CNC-machined flanges improve sealing accuracy and enhance durability, while mandrel-bent piping minimizes flow restrictions. The polished finish adds visual appeal, making this exhaust both functional and stylish for Civic Si owners.
Pros
- SUS304 stainless steel for enhanced corrosion resistance
- Mandrel-bent piping reduces back pressure
- CNC-machined flanges ensure precise fit
- Titanium tip adds lightweight durability and distinct look
Cons
- Single titanium tip limits sound customization options
Civic Si enthusiasts with models from 2006-2011 will appreciate this system’s balance of durable materials and eye-catching design that boosts performance and style.
4. Invidia (HS12HC2STT) N1 Titanium Tip Cat-Back Exhaust System for Honda
Best for: Focused on 2012-Up Civic Si Coupe users.
The Invidia HS12HC2STT Cat-Back Exhaust system is crafted with SUS304 stainless steel and features a 3-inch (76mm) pipe diameter coupled with a 101mm titanium tip, promoting high exhaust flow and distinctive sound characteristics.
Its CNC-machined flanges ensure a precise and secure fitment that reduces leaks. Mandrel bends maintain smooth gas flow, which lowers back pressure and can improve engine responsiveness and efficiency for 2012 and newer Civic Si Coupes.
Pros
- SUS304 stainless steel for strength and rust resistance
- Mandrel-bent pipes retain optimal exhaust velocity
- CNC flanges improve sealing and fit
- Titanium tip combines durability with unique appearance
Cons
- Weighs 5 pounds, which is heavier than some minimalist axle-back options
This exhaust fits drivers seeking a durable and performance-oriented cat-back solution for 2012 and later Civic Si Coupes, balancing sound and power gains with reliability.
5. DNA MOTORING CBE-HC922-NRT Stainless Steel Cat Back Exhaust System [Compatible
Best for: Compatible with 1992-2000 Civic Coupe/Sedan.
Constructed from T-304 stainless steel with mandrel bends, the DNA MOTORING CBE-HC922-NRT Cat Back System promotes strength and smooth exhaust gas flow, resulting in increased low-end horsepower and torque for older Civic models.
The system includes double-walled muffler tips and features TIG welded CNC machine flanges for durable pressure handling and corrosion resistance. It provides an aggressive yet smooth exhaust tone tailored for 92-00 Hondas.
Pros
- T-304 stainless steel supports long-term durability
- Mandrel bends enhance exhaust performance
- Double-walled muffler tip improves sound quality
- TIG welded CNC flanges resist corrosion
Cons
- Limited to older Civic models, not fit for newer generations
Ideal for drivers of 1992-2000 Honda Civics wanting to gain horsepower and a deeper tone with a durable stainless steel cat-back exhaust.
6. BORLA 140803CB Cat-Back Performance Exhaust System for 2017-2020 Honda Civic
Best for: Robust audio upgrade for 2017-2020 Civic.
Built from T-304 stainless steel, the BORLA 140803CB Cat-Back Exhaust delivers the classic Borla sound signature through an all welded construction, ensuring durability and a high-quality audio presence for the 2017-2020 Civic.
This heavier system weighs 35 pounds but installs via a bolt-on process, enabling straightforward fitting. Made in the USA, it benefits from a 30-day manufacturer warranty and is designed to resist corrosion for long-lasting use.
Pros
- Classic Borla exhaust tone enhances driving experience
- All welded construction improves system strength
- T-304 stainless steel resists rust and corrosion
- Bolt-on installation for easy fitting
Cons
- Relatively heavy at 35 pounds, adding to vehicle mass
Drivers of the 2017-2020 Civic looking for a robust, sonorous exhaust upgrade with durable materials and straightforward installation will find this system fitting.
7. Invidia (HS06HC4STT) N1 Titanium Tip Cat-Back Exhaust System for Honda
Best for: Specifically for 2006-2011 Civic Si Sedan.
The Invidia HS06HC4STT Cat-Back Exhaust features a 76mm pipe and a 101mm titanium tip, combining SUS304 stainless steel materials with CNC-machined flanges to support maximum exhaust flow and reduce back pressure for enhanced engine output.
At 39.5 pounds, it’s heavier than some alternatives but ensures a polished finish for corrosion resistance and aesthetic appeal. The mandrel-bent piping design smooths gas movement, assisting in optimized engine performance for Civic Si sedans.
Pros
- High-grade SUS304 stainless steel construction
- Mandrel-bent pipes minimize restriction
- CNC flanges optimize fit and durability
- Titanium tip for distinctive style and longevity
Cons
- System weight of 39.5 pounds might affect vehicle weight balance
This exhaust suits 2006-2011 Civic Si Sedan owners seeking a balance of polished aesthetics and performance gains with reliable stainless steel craftsmanship.
8. Invidia (HS12HC2G3S) Q300 Cat-Back Exhaust System with Stainless Steel Rolled
Best for: Designed for 2012-Up Civic with broader piping.
The Invidia HS12HC2G3S Cat-Back Exhaust introduces a larger 110mm tip diameter paired with piping measuring 70mm, offering a unique configuration that supports distinct sound profiles and exhaust dynamics on 2012 and newer Civics.
Weighing 51.5 pounds, the system combines a rolled stainless steel rolled tip contributing to durability and a polished finish for corrosion resistance. Its size supports higher flow rates while featuring brand quality manufacturing standards.
Pros
- Large 110mm tip enhances exhaust sound projection
- Stainless steel rolled tip increases longevity
- 70mm piping balances flow and backpressure
- Polished finish resists corrosion
Cons
- Heaviest option at 51.5 pounds requiring consideration for overall vehicle weight
This cat-back exhaust fits Civic owners aiming to maximize exhaust sound impact and durability with a standout pipe and tip size in 2012 and newer models.
9. MagnaFlow Performance Cat-Back Exhaust System Kit 19373
Best for: For drivers seeking iconic MagnaFlow tone.
The MagnaFlow Performance Cat-Back Exhaust System 19373 features dual center rear exits engineered to produce the signature MagnaFlow resonant, throaty sound for 2017-2021 Civic models, enhancing both interior and exterior audio presence.
Its construction includes a resonator assembly, mid extension pipe, muffler assembly, and precision clamps and gaskets. Designed after extensive dyno testing, it improves engine power by optimizing exhaust gas evacuation dynamics.
Pros
- Signature MagnaFlow exhaust tone
- Dual center rear exit for balanced sound
- Includes complete installation components
- Dyno-tested for increased engine performance
Cons
- Only compatible with 2017-2021 Civic models
Ideal for modern Civic owners looking to upgrade exhaust sound with a reliable system validated for performance enhancement across 2017-2021 models.
10. Invidia Gemini Cat-Back Exhaust w/Ti Burnt Tips for 2017+ Honda
Best for: Premium burnished look for 2017+ Civic.
The Invidia Gemini Cat-Back Exhaust complements 2017 and later Civic models with its distinctive titanium burnt tips, adding a premium aesthetic alongside durable stainless steel for enhanced exhaust tone and longevity.
This system’s design emphasizes visual impact as well as performance, providing a polished piping layout and robust construction to ensure resistance to corrosion and heat. It also includes CNC-machined components that contribute to a secure fit.
Pros
- Titanium burnt tips offer unique styling
- Durable stainless steel resists rust
- High-quality construction supports longevity
- Polished piping enhances appearance
Cons
- Limited detailed specifications on piping diameter affect performance assessment
Civic owners from 2017 onward who desire a blend of premium styling and solid exhaust performance in their upgrade will appreciate this elegant option.
How to Choose the Right Best 9th Gen Civic Si Exhaust
Material quality and durability
Choosing an exhaust system for your 9th gen Civic Si begins with prioritizing material quality for durability and performance. Stainless steel exhausts offer excellent resistance to corrosion and high heat, ensuring longevity and stable sound quality over time. Titanium options deliver a lighter weight and improved heat tolerance but at a trade-off for cost and potential tone harshness.
Aluminized steel, while more affordable, is less resistant to rust and heat damage, making it suitable for milder climates or shorter-term use. For the best balance of durability, corrosion resistance, and consistent sound, a high-grade stainless steel exhaust is the superior choice for Civic Si owners seeking long-term reliability and performance.
Performance enhancements
To maximize performance gains from a 9th gen Civic Si exhaust, focus on systems designed to enhance exhaust flow while minimizing backpressure. A well-engineered mandrel-bent exhaust with smooth piping increases horsepower and torque by allowing gases to exit efficiently. Look for exhausts that specify compatibility with additional performance upgrades like cold air intakes or headers to ensure synergy.
Avoid restrictive designs or those with unnecessary bends that can hinder output. Selecting an exhaust system with proven flow optimization tailored to the Civic Si’s engine delivers tangible improvements in power delivery and throttle response.
Sound and acoustic characteristics
Sound is a defining aspect of an exhaust upgrade for the 9th gen Civic Si, so assessing loudness and tonal characteristics is critical. Choose systems offering a sound profile that complements sporty driving—typically a deep, aggressive tone without excessive drone. Muffler design and the inclusion of resonators play key roles in shaping exhaust note and controlling volume.
Confirm that the exhaust meets legal noise limits in your area to avoid issues with law enforcement. An exhaust that balances assertive sound with compliance and driver comfort ensures a satisfying auditory experience without sacrificing legality.
Fitment and installation
Proper fitment streamlines installation and guarantees optimal exhaust function on a 9th gen Civic Si. Prioritize exhaust systems that explicitly list models and years for compatibility to avoid fabrication headaches. Select options that include necessary installation hardware such as clamps, gaskets, and hangers to reduce additional purchases and labor.
A bolt-on system requiring no welding or cutting is ideal for ease and speed of installation. For most Civic Si owners, a proven direct-fit exhaust with comprehensive hardware coverage provides hassle-free assembly and precise fitment.
Design and style
Design and style influence the visual appeal and personal expression of your Civic Si’s exhaust. Look for exhaust tips offered in finishes like polished stainless steel or black chrome to match your car’s aesthetic. Popular shapes like dual round or slash-cut tips enhance the rear profile with a sporty flair.
Factor in brand reputation and warranty terms that protect your investment and attest to quality. Selecting an exhaust that balances distinctive styling with solid manufacturer support guarantees a confident upgrade that complements your Civic Si’s overall look.
Which Should You Choose?
- If you prioritize a straightforward installation and long-lasting stainless steel durability, choose an exhaust system featuring T-304 stainless steel construction with bolt-on design and welded joints.
- If enhancing engine performance with precise mandrel bends is your main goal, select a cat-back exhaust system built with computerized mandrel-bent tubing for optimal exhaust flow.
- If you want a bold, aggressive exterior styling with a large, polished titanium or stainless steel tip, opt for an exhaust featuring sizeable 3″ piping and 4″ or larger tips with premium finishing.
- If you seek a deep, resonant sound characteristic with reduced drone inside the cabin, go for exhausts engineered with drone-reduction technology and sound tuning for a balanced auditory experience.
Quick Best 9Th Gen Civic Si Exhaust Buying Checklist
- Material Type: Choose stainless steel or titanium for durability and rust resistance.
- Performance Gains: Look for exhausts designed to improve horsepower without excessive noise.
- Sound Level: Consider your preferred exhaust tone and check noise compliance.
- Fitment: Ensure the exhaust system matches your 9th gen Civic Si’s specifications.
- Installation Ease: Opt for systems with included hardware and minimal modification requirements.
- Warranty and Brand: Select reputable brands offering good warranty coverage for peace of mind.
Frequently Asked Questions
What Materials Are Best For A 9Th Gen Civic Si Exhaust?
Stainless steel and titanium are the best materials for a 9th gen Civic Si exhaust because they offer superior durability and corrosion resistance. Stainless steel balances cost and longevity, while titanium is lightweight and highly resistant to heat damage, making them ideal choices for performance and durability.
How Does An Aftermarket Exhaust Affect Performance?
An aftermarket exhaust improves the 9th gen Civic Si’s performance by enhancing exhaust flow and reducing backpressure. This increased efficiency can boost horsepower and torque, resulting in a more responsive engine and potentially better fuel economy when paired with other modifications.
Are Louder Exhaust Systems Better For The Civic Si?
Louder exhaust systems are not necessarily better for the 9th gen Civic Si, as excessive noise can lead to legal issues and driver discomfort. A balanced exhaust tone that enhances sound without being overly loud is often preferred for street use and compliance with noise regulations.
Is Installation Difficult For 9Th Gen Civic Si Exhausts?
Installation difficulty varies, but many 9th gen Civic Si exhausts are designed for bolt-on installation with included hardware. Some may require minor modifications or professional assistance, but most popular systems aim to offer a straightforward setup to suit DIY enthusiasts.
Why Is Warranty Important When Selecting An Exhaust System?
Warranty is crucial because it protects your investment in the 9th gen Civic Si exhaust against defects and premature failure. A reputable brand offering substantial warranty coverage ensures peace of mind and often reflects confidence in the product’s quality and durability.
Final Thouthgs
Choosing the best 9th gen Civic Si exhaust can significantly elevate your car’s performance, sound, and style. These exhaust systems offer enhanced power delivery, durable construction, and personalized acoustic appeal for versatile driving experiences. Investing in a quality exhaust will not only improve your ride but also keep your Civic Si sounding and performing at its best for the road ahead.
