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If you drive a 2016-2021 Honda Civic and want more exhaust flow, sharper tone, or a motorsport-inspired note, upgrading the cat-back exhaust system is one of the most effective bolt-on changes you can make. For Civics in the 2016-2021 (FC and FK) window the right cat-back balances improved scavenging and reduced backpressure with durable materials and factory-like fitment.This guide covers the top shortlisted cat-back options for the 2016-2021 Civic, explaining why they made the list and what to expect from each style of system. We evaluate ease of installation, sound character, and long-term durability so you can pick a system that matches your driving priorities. Read on to compare the tradeoffs and prepare for installation or professional fitment.
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Top Picks at a Glance
| Best Overall The best all-around choice for most situations | MagnaFlow Street Series Cat-Back Performance Exhaust System for 2016-2021 Honda Civic |  |
| Best Quality Built to a higher standard if you want something more solid | Borla 140739 Cat-Back Performance Exhaust System, T-304 Stainless Steel, Dual Center Rear Exit |  |
| Best Value The sweet spot between price and what you get | BRExhaust Direct-Fit Replacement Exhaust Kit 106-0953 for 2016-2021 Honda Civic 2.0L |  |
| Best Budget The cheapest option that still gets the job done reliably | Autozensation Polished Stainless Steel Catback Exhaust for Honda Civic 1.5L Turbo (2016–2021) |  |
| Highest Rated A top-rated pick with lots of positive feedback | MagnaFlow Street Series Cat-Back Exhaust for 2017–2021 Honda Civic 1.5L |  |
| Most Popular A crowd favorite that many people choose with confidence | Spec-D Tuning Polished Stainless Steel Catback Exhaust for 2016–2021 Honda Civic 1.5L Turbo |  |
1. MagnaFlow Street Series Cat-Back Performance Exhaust System for 2016-2021 Honda Civic
| Compatible with Vehicle Type | Car, Truck, Van |
|---|---|
| Installation Type | Bolt-On |
| Material Type | Stainless Steel |
| Main Piping Diameter | 2.25" |
| Tip Diameter | 4" |
The MagnaFlow Street Series cat-back replaces the Civic's factory rear exhaust from the catalytic converter back with mandrel-bent stainless piping, straight-through mufflers, and polished dual split tips to deliver dyno-proven gains and a deeper exterior tone while keeping interior noise comfortable. It is built as a bolt-on, vehicle-specific kit that uses CNC-accurate manufacturing for consistent fitment and comes with a limited lifetime construction warranty. Typical use is daily driving with occasional spirited runs where you want audible but not overly aggressive sound and a small improvement in throttle response. Notable features include stainless steel construction for corrosion resistance, resonated double-wall angled tips for a refined exhaust note, and a 2.25 inch main piping diameter targeted at balanced flow. Expect a moderate, engineered sound level rather than racecar loudness and generally straightforward installation if you or a shop follow installation guidance. The system is focused on the 2016–2021 Civic platform so it does not offer multi-vehicle flexibility and professional installation may be advisable for perfect alignment and hanger adjustments.
Best for: Buyers who want a balanced upgrade that improves exhaust flow and sound without becoming intrusive, and who prioritize reliable fitment and long-term durability for everyday driving and occasional spirited use.
Less Ideal for: Drivers seeking an aggressive, race-level exhaust note or a universal system that fits multiple vehicle models should consider different options.
- Vehicle-specific fit for 2016–2021 Honda Civic improves installation accuracy
- Stainless steel, mandrel-bent construction for corrosion resistance and consistent flow
- Street-tuned straight-through mufflers provide a deeper exterior tone while keeping cabin noise comfortable
- Bolt-on design and CNC-precision manufacturing promote consistent fitment and easier installation
- Designed only for the 2016–2021 Honda Civic so not compatible with other models
Verdict: A factory-quality, vehicle-specific cat-back that adds measured power and a refined exterior sound for Civic owners who want performance without excess noise.
2. Borla 140739 Cat-Back Performance Exhaust System, T-304 Stainless Steel, Dual Center Rear Exit
| Inlet Connection Size | 3.5 Inches |
|---|---|
| Item Type | Catback |
| Material | T-304 Stainless Steel |
This Borla cat-back replaces the factory rear section with a T-304 stainless steel system designed to deliver a loud, aggressive racing tone under both light and heavy acceleration. It is a bolt-on installation that uses welded construction and adjustable hangers so the system can be aligned without cutting or extensive modification. The rear muffler delete and S-type piping emphasize exhaust volume and throttle response, making it well suited for spirited street driving and occasional track use. Practical benefits include corrosion-resistant stainless construction for long life and polished dual 3.5 inch tips that give a sporty visual upgrade. Expect pronounced cabin and exterior noise at cruising and wide-open throttle, and the focus on sound means this is not a refinement-oriented upgrade. Installation is straightforward for anyone comfortable with basic exhaust work, but drivers seeking a quiet or subtle cruising system should consider other options.
Best for: Drivers who prioritize maximum exhaust sound and throttle response for spirited street driving or track days and want a durable, bolt-on stainless upgrade for their Civic Sport.
Less Ideal for: Anyone seeking a quiet, refined cruising experience or a subtle exhaust tone for daily commuting should look at milder or chambered systems instead.
- T-304 stainless steel construction resists corrosion for long-term durability
- Bolt-on fit with welded construction and adjustable hangers simplifies installation and alignment
- Rear muffler delete and S-type piping produce an aggressive, racing-style exhaust tone
- Polished dual 3.5 inch tips provide a sporty finished look
- Very loud under cruising and acceleration which may be intrusive for daily driving
Verdict: Choose this Borla system if you want a durable, bolt-on stainless cat-back that delivers aggressive, track-ready sound for a 2017–2021 Civic Sport.
3. BRExhaust Direct-Fit Replacement Exhaust Kit 106-0953 for 2016-2021 Honda Civic 2.0L
| Fitment | 2016-2021 Honda Civic 2.0L |
|---|---|
| Construction | Aluminized steel |
| Design | Mandrel-bent, multi-piece bolt-on |
| Included components | Ring gasket, 3 nuts, 3 2in. band clamps |
| Warranty | 2 year warranty |
This BRExhaust kit replaces everything from or just behind the last catalytic converter with mandrel-bent pipes and a multi-piece bolt-on design that keeps installation straightforward for a competent DIYer or independent shop. The kit arrives with the necessary ring gasket, nuts and band clamps so you do not need to source extra hardware, and the mandrel bends promote smoother exhaust flow compared with crush-bent aftermarket pipes. Constructed from aluminized steel, the system balances corrosion resistance and cost while retaining all emissions equipment to stay compliant. Expect a near-factory fit that requires no welding or bending and can be installed around underbody obstructions thanks to the split pieces. Limitations are the material choice and factory-style construction, which prioritize durability and fit over high-output performance or a dramatic sound change. The included two year warranty provides added confidence for long-term use but this kit is best when you want a reliable, factory-replacement cat-back rather than a performance upgrade.
Best for: Buyers who prioritize a practical, cost-conscious replacement that restores factory fit, function and emissions compliance while minimizing installation hassle.
Less Ideal for: Drivers seeking a high-performance exhaust tone, maximum flow gains, or premium stainless construction should consider a purpose-built performance system instead.
- Direct-fit multi-piece bolt-on design simplifies installation without welding or bending
- Mandrel-bent pipes improve exhaust flow compared with crush-bent alternatives
- Includes necessary gasket, nuts and band clamps so no extra hardware is required
- Aluminized steel construction offers solid corrosion resistance for long-term use
- Aluminized steel is less durable and rust-resistant than stainless steel performance systems
Verdict: A practical direct-fit cat-back that restores factory fit and function with improved flow and simple bolt-on installation for 2016–2021 Civic 2.0L owners.
4. Autozensation Polished Stainless Steel Catback Exhaust for Honda Civic 1.5L Turbo (2016–2021)
| Material Type | Stainless Steel |
|---|---|
| Installation Type | Bolt-On |
| Automotive Fit Type | Vehicle Specific Fit |
| Compatible with Vehicle Type | Car |
This Autozensation cat-back exhaust swaps the factory rear section for a polished stainless steel system designed specifically for the 1.5L turbo Civic sedan (2016–2021, not Si). It uses mandrel-bent piping, includes hangers, gaskets, and bolts, and is a bolt-on installation intended for professional fitting though it requires minimal modification. The maker claims up to a 15 hp gain from improved exhaust flow and the system produces a deeper, smooth tone that suits daily drivers who want sportier sound without extreme drone. The polished finish and 3.8-inch outlet tip give a visible upgrade at the rear. Because it is vehicle-specific and made from stainless steel it should resist corrosion better than cheaper steel options, but expect installation labor and possible tuning to realize peak power gains. This is a value-oriented cat-back that balances appearance, sound, and modest performance gains for budget-minded owners who still want a durable, factory-fit upgrade.
Best for: Buyers wanting an affordable, vehicle-specific cat-back that improves exhaust sound and appearance while offering modest performance gains on a 2016–2021 Civic 1.5L Turbo sedan.
Less Ideal for: Drivers seeking maximum power gains or a highly aggressive exhaust note should look at higher-end performance systems or full turbo-specific setups.
- Vehicle-specific fit for 2016–2021 Honda Civic 1.5L Turbo sedan (not Si) for straightforward replacement
- Full stainless steel construction with polished finish for improved corrosion resistance and looks
- Mandrel-bent piping and included hangers, gaskets, and bolts simplify installation
- Deeper, smooth exhaust tone with a 3.8-inch outlet tip that enhances rear appearance
- Performance claim of up to 15 hp may require additional tuning and is not guaranteed
- Professional installation recommended, adding labor cost for budget buyers
Verdict: A budget-friendly, stainless steel cat-back that gives 2016–2021 Civic 1.5L Turbo sedans improved sound and a factory-style fit without a premium price.
5. MagnaFlow Street Series Cat-Back Exhaust for 2017–2021 Honda Civic 1.5L
| Vehicle fit | 2017-2021 Honda Civic L4 1.5L |
|---|---|
| Main piping diameter | 2.25" |
| Tip diameter | 4.5" |
| Muffler material | Stainless Steel |
The MagnaFlow Street Series cat-back replaces the factory rear section on 2017–2021 Civic 1.5L models to improve exhaust flow and give the car a deeper, more resonant tone without harsh rasp. It is a bolt-on system with dual center rear exit and 2.25 inch main piping designed to be a direct fit for this Civic, so installation is usually straightforward for someone with basic garage skills or a shop install. Construction uses black-coated stainless steel and straight-through mufflers for corrosion resistance and a free-flowing sound profile; welded, double-wall 4.5 inch tips finish the look. Dyno-proven tuning is claimed to provide modest power gains while keeping interior noise comfortable at cruising speeds, though some users report low-speed drone in vehicles with more aggressive upstream components. The system includes hangers and a bolt-on inlet for simpler mounting. If you want a durable, factory-quality replacement that prioritizes quiet, refined sound and proven fitment for this Civic, this system delivers; expect professional installation if you are not comfortable under the car and be aware aftermarket upstream changes can change how it sounds.
Best for: Buyers seeking a durable, factory-quality cat-back that improves flow and gives a deeper but controlled exhaust note while maintaining reliable, long-term performance for daily-driven Civics.
Less Ideal for: Drivers who want a very loud, aggressive exhaust or who prefer to tune extreme performance characteristics should consider more aggressive systems or different configurations.
- Direct-fit design for 2017–2021 Honda Civic 1.5L reduces fitment hassles
- Black-coated stainless steel resists corrosion and maintains appearance
- Straight-through muffler and 2.25 inch piping improve exhaust flow and deliver a deeper, refined sound
- Includes hangers and bolt-on inlet for simpler installation
- Some setups report noticeable low-speed drone, especially with upgraded downpipe or front pipe
Verdict: Choose this system if you want a durable, direct-fit cat-back that delivers a deeper, refined sound and reliable long-term performance for 2017–2021 Civic 1.5L models.
6. Spec-D Tuning Polished Stainless Steel Catback Exhaust for 2016–2021 Honda Civic 1.5L Turbo
| Fitment | 2016-2021 Honda Civic 1.5L Turbo Sedan (not Si) |
|---|---|
| Material | Polished Stainless Steel |
| Item Type | 1.5L Turbo Exhaust |
| Warranty | 90 Day Replacement Warranty Against Manufacturer Defects |
This Spec-D Tuning cat-back replaces the factory rear exhaust on 2016–2021 Civic 1.5L turbo sedans to deliver a deeper, more aggressive tone and improved exhaust flow. It is built from polished stainless steel and arrives as a full system intended to bolt in with little to no modification for the sedan model. Typical use is a direct swap to refine sound and add a sportier note during acceleration and at idle. Notable features include vehicle-specific fitment targeting the 10th-generation Civic sedan and visible polished tips for a cleaner rear appearance. In practice the system provides a deeper, non-raspy tone that many owners describe as an even, turbo-friendly growl and it can accentuate turbo spool sounds under load. Limitations to watch for: a handful of buyers needed minor adjustments to hangers or clamps and some reported tip alignment or fit issues on hatchback or non-sedan variants, so careful mock-up during installation is recommended. Expect a relatively straightforward install on the sedan and a noticeable change in sound and character without extensive modification.
Best for: Buyers who prioritize proven, vehicle-specific upgrades and want a noticeable but not obnoxious change in exhaust tone for a 10th-generation Civic sedan, with installation that is mostly straightforward for a DIYer or local shop.
Less Ideal for: People wanting a perfect universal fit for hatchbacks or Si models or those who expect a no-adjustment, factory-exact replacement for non-sedan variants.
- Vehicle-specific design for 2016–2021 Civic 1.5L turbo sedans improves likelihood of bolt-on fit for the sedan.
- Polished stainless steel construction resists corrosion and keeps a clean finished look.
- Full cat-back system changes tone and exhaust flow without replacing manifold or mid-pipe.
- Multiple user reports of a deep, balanced sound that is louder under throttle but not excessively raspy.
- Some units required minor hanger adjustments or custom supports to align perfectly.
- Tips may protrude or require trimming/adjustment on non-sedan configurations.
Verdict: A cost-effective, polished stainless steel cat-back that reliably deepens and refines the Civic 1.5L turbo sedan exhaust tone with mostly straightforward installation.
Choosing the Right 2016-2021 Honda Civic Cat-back Exhaust System: Key Factors to Consider
Fitment and Compatibility
Accurate fitment matters because the 2016-2021 Civic has specific hanger locations, piping bends, and underbody clearances. A system designed for this exact model year range reduces the need for cutting, welding, or aftermarket adapters. Mismatched systems can lead to exhaust leaks, rattles from improper hanger placement, or interference with suspension components.
Also consider whether the system retains the stock catalytic converter placement or requires relocation. Systems that attach to the factory cat flange and use OEM hangers make installation simpler and maintain emissions equipment alignment. If you plan to keep factory sensors, check that bung locations and O2 sensor extensions match the Civic's routing to avoid electrical extensions or sensor relocation.
Material and Construction Quality
The material directly impacts corrosion resistance, longevity, and overall appearance. Higher-grade stainless steel and TIG-welded seams resist rust and cracking from thermal cycling better than lower-grade metals. Look for details such as mandrel-bent piping to preserve internal diameter and smooth flow through bends.
Construction quality also includes flange thickness, hanger robustness, and weld penetration. Thicker flanges reduce the chance of warping at high temperatures, and sturdy, vibration-resistant hangers prevent premature wear. Durable finishes or coatings can help in salty climates, but full stainless construction is the most reliable long-term choice.
Sound Character and Noise Levels
Different designs yield distinct sound signatures. Straight-through, free-flow designs tend to be louder and more aggressive, while chambered mufflers produce deeper, more refined tones. Consider how the system will sound at idle, light throttle, and wide-open throttle to avoid surprises.
Noise levels affect daily drivability and neighborhood considerations. If you use the Civic for commuting, you may prefer a system that tones down at cruise while still providing a satisfying note under load. Conversely, if you prioritize track use or spirited driving, a more open design that emphasizes mid- and high-RPM rasp might be acceptable.
Performance Impact and Driveability
A well-designed cat-back can reduce backpressure and improve exhaust scavenging, which may translate to smoother throttle response and modest gains in midrange power. However, excessive scavenging or overly large diameter piping can reduce low-end torque, negatively affecting daily drivability.
Assess whether the system's intended purpose aligns with your driving: street focus, occasional track use, or full performance orientation. Also check whether the design maintains sufficient backpressure for turbocharged variants if applicable, as radical exhaust changes on turbo cars can alter boost behavior and require retuning.
Installation Complexity and Hardware
Installation ease varies from simple bolt-on with factory-style clamps to systems requiring cutting or welding. Confirm whether the kit includes all necessary gaskets, bolts, and hangers and whether special tools are needed. Systems that use OEM-style clamps and hangers minimize installation time and reduce the chance of exhaust misalignment.
Consider whether you will install it yourself or prefer a shop. Some systems may fit with hand tools in a driveway, while others require lifts and welding. Also check for instructions and fitment guides; clear documentation reduces installation errors and post-install noises.
Emissions and Legal Considerations
Exhaust changes can affect emissions compliance. For the 2016-2021 Civic, ensure any cat-back system retains the catalytic converter location and sensor bungs if local regulations require them. Removing or relocating emissions equipment can create legal or inspection problems in some jurisdictions.
Look for systems that explicitly state compatibility with stock emissions equipment and maintain O2 sensor placements. If the system alters noise levels substantially, verify local noise ordinances or inspection requirements to avoid fines or failed inspections.
Understanding Cat-Back Versus Axle-Back Systems
A cat-back exhaust system replaces the piping from the catalytic converter back to the tailpipe, while axle-back systems only replace the rear section behind the rear axle. For the 2016-2021 Civic, a cat-back offers more opportunity to change tone, flow, and backpressure because it includes mid-piping and muffler choices.
Choosing a cat-back makes sense if you want meaningful changes in sound and exhaust dynamics without touching the catalytic converter. It also gives more control over midsection diameter and resonator placement, which directly influence responsiveness and character.
- Cat-back affects midrange torque and throttle response more than axle-back.
- Cat-back options typically offer greater sound customization.
- Axle-back is simpler to install but provides smaller performance changes.
Materials and Finish Options for Longevity
Stainless steel is the most common choice for durability, with higher grades resisting corrosion in wet or salted-road environments. Pay attention to the specification of the steel and whether any protective coatings are used for additional rust resistance.
Finishes such as brushed, polished, or ceramic-coated surfaces influence aesthetics and heat management. Ceramic coatings can reduce underbody heat transfer and protect the finish, while polished tips resist staining for a cleaner look.
- Look for welded construction and mandrel-bent piping.
- Ceramic coating can help manage heat near body panels.
- Polished tips improve appearance but do not affect performance.
Sound Tuning and Resonator Placement
Resonators and muffler designs shape the exhaust note by targeting specific frequencies and dampening unwanted droning. Systems with removable or replaceable resonators give the most flexibility for owners who want to fine-tune tone without swapping the whole system.
Placement of resonators in the mid-pipe can reduce cabin drone at cruising speeds while preserving an assertive sound under acceleration. Review the system's description of resonator location to match your tolerance for drone and cabin noise.
- Mid-pipe resonators reduce cruise drone but may slightly lower peak volume.
- Chambered mufflers produce deeper tones while straight-through designs are brighter.
- Some kits offer interchangeable components for adaptable sound.
Preparing for Installation on a 2016-2021 Civic
Before starting installation, inspect hangers and mounting points for wear; replacing weakened hangers improves alignment and long-term fit. Have replacement gaskets and anti-seize lubricant on hand to ease future disassembly.
If you are working on a Civic in the 2016-2021 FC and FK window, ensure jack stands or a lift provide safe access to the mid-pipe and underbody. Review torque specs for flange bolts and check for recommended tightening sequences in the kit documentation.
- Replace worn hangers to prevent sagging or rattles.
- Apply anti-seize to bolts to prevent corrosion and ease removal.
- Test-fit components before final torque to confirm alignment.
Noise Regulations and Practical Street Use
Street-driven Civics need a balance between personality and practicality. Loud systems that shine on track may be intrusive during daily commuting or trigger noise complaints in residential areas. Consider local noise limits and typical driving speeds when selecting an exhaust.
Also think about how the exhaust behaves at low throttle. Some aggressive systems produce sharp pops or crackles on deceleration that could be undesirable for daily use. Aim for a system whose character fits your regular driving environment.
- Verify local noise ordinance limits before selecting a loud system.
- Consider systems that manage deceleration noises if you commute frequently.
- A mid-range-focused system often works best for mixed street and occasional spirited driving.
Still looking for the perfect fit?
Select your Honda Civic configuration to see the most relevant Cat-back Exhaust Systems recommendations
How We Chose the Best 2016-2021 Honda Civic Cat-back Exhaust System
We filtered candidate systems by criteria that matter specifically to owners of 2016-2021 Honda Civic models. First, fitment accuracy was prioritized: systems had to target the Civic 2016-2021 exhaust routing and hangers to minimize modification during installation. Materials and corrosion resistance were weighed heavily, with stainless steel grades and welded construction scoring higher for longevity in varied climates.Sound profiling was evaluated for systems that offer clear descriptions of expected tone across idle, cruise, and WOT. Flow and measured or specified backpressure improvements mattered for owners seeking performance gains without compromising drivability. Ease of installation and compatibility with stock catalytic converters and OEM mounting points was another filter, as many owners prefer a bolt-on swap.We excluded systems that required heavy fabrication, permanent chassis modification, or engine management changes. Also filtered out were options lacking basic fitment documentation for the 2016-2021 Civic. The final list balances durability, realistic performance benefits, and installation practicality for street-driven Civics in this generation.
Our full evaluation process is outlined in our review methodology.
FAQ
Will a cat-back exhaust system change my Civic's fuel economy?
A cat-back can slightly affect fuel economy depending on how it alters engine load and your driving style. Smooth flow and reduced backpressure may improve efficiency under some conditions, but louder systems often encourage heavier throttle use, which can lower MPG.
Can I install a cat-back on my 2016-2021 Civic without modifying the catalytic converter?
Yes. Most cat-back systems are designed to bolt to the stock catalytic converter flange and use existing hangers, avoiding changes to emissions hardware. Confirm fitment notes to ensure O2 sensor bungs and flange alignments match your Civic.
How noisy will a performance cat-back be at highway speeds?
Noise varies by design. Systems with larger diameter piping and straight-through mufflers tend to be louder at highway speeds, while those with resonators and chambered mufflers reduce cabin drone. Look for sound descriptions that include cruise characteristics if highway comfort is important.
Is stainless steel worth the extra cost for a Civic exhaust?
Stainless steel typically resists rust and lasts longer, especially in wet or salted-road climates. If you plan to keep the car long term, the durability and reduced maintenance needs often justify choosing higher-grade materials.
Will changing to a cat-back require engine tuning?
Most cat-back swaps do not require engine tuning because they do not alter fuel or air metering significantly. However, very large-diameter systems or changes that affect backpressure on turbo models may benefit from calibration, so consider your engine variant and expected gains.
How do I avoid exhaust drone after installing a cat-back?
To minimize drone, choose systems with well-placed resonators and mufflers designed to dampen the frequencies associated with cabin resonance. Proper installation using solid hangers and correct alignment also reduces unwanted vibration and noise.
Final Verdict
When selecting a cat-back exhaust for a 2016-2021 Honda Civic, prioritize fitment, materials, and the sound profile that matches your daily use. Durable construction and correct hanger alignment reduce installation headaches and long-term issues. Expect modest performance and throttle response changes from a quality cat-back, with the biggest differences coming from mid-pipe design and muffler choice.Balance your desire for a sportier tone against potential noise and regulatory considerations. If you want a confident, daily-drivable upgrade, choose a system that retains resonators or offers targeted sound control. For owners focused on track-oriented sound, accept the tradeoffs in drone and street practicality.
Explore More:
- Check out all Honda Civic parts & accessories
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- Explore Exhaust & Emissions
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