Honda Civic 1.5T Cat-Back Exhaust with a Deeper N1-Style Tone
Give your daily-driven Civic a stronger exhaust note and a cleaner rear-end look with a system designed to install without cutting, welding, or custom fabrication. This FLASHARK cat-back exhaust is built for compatible 2016-2021 Honda Civic Sedans equipped with the factory 1.5L turbocharged engine, pairing T-304 stainless steel construction with mandrel-bent tubing and an N1-style muffler and tip.
The straight-through layout is intended to reduce unnecessary restriction compared with the factory rear exhaust while adding a deeper, more aggressive tone under throttle. Sound inside the cabin will vary with engine speed, transmission, load, and any other exhaust modifications, so use the customer audio below as a practical reference rather than expecting every car to sound identical.
Specifications
| Brand | FLASHARK |
|---|---|
| SKU | FLES08177 |
| Product type | Cat-back exhaust system |
| Material | T-304 stainless steel |
| Surface finish | Mirror polished |
| Inlet diameter | 2.3 inches |
| Outlet tip diameter | 3.8 inches |
| Muffler style | N1 style |
| Installation type | Direct bolt-on; no modification required |
| Estimated installation time | 1-2 hours |
Hear It on a Customer Car
Phone speakers cannot reproduce the lowest exhaust frequencies accurately, but this clip provides a useful reference for the N1-style tone and volume character.
Built for Sound, Fitment, and Everyday Durability
T-304 Stainless Steel
Mirror-polished T-304 stainless steel provides a corrosion-resistant finish suited to an exhaust system exposed to heat, moisture, and road debris.
Mandrel-Bent Tubing
Computer-controlled mandrel bends help maintain a consistent passage through the curves rather than creating abrupt crushed sections that interrupt exhaust flow.
N1-Style Muffler and Tip
The straight-through muffler and 3.8-inch outlet give the car a deeper, more assertive tone and a visible N1-inspired finish at the rear bumper.
Direct Bolt-On Layout
The system uses the vehicle's factory-style mounting locations. No cutting, welding, or custom fabrication is required on a compatible vehicle.
- TIG-welded connections and CNC-machined flanges help provide secure joints and resistance to heat, pressure, and corrosion.
- The freer-flowing layout is designed to support smoother exhaust gas movement and a more responsive driving character.
- The mirror-polished surface and N1 tip add a purposeful appearance without changing the vehicle's bodywork.
- All required installation hardware is included in the package.
Honda Civic Cat-Back Exhaust Installation Notes
On a compatible car, this is a direct bolt-on installation that normally takes about 1-2 hours. A lift makes the work faster, but ramps or properly rated jack stands can also provide access when used on level ground. Never work under a vehicle supported only by a jack.
- Allow the exhaust to cool completely and safely raise the vehicle.
- Inspect the factory fasteners and rubber hangers; penetrating oil can help with corrosion or stubborn hardware.
- Support the original exhaust before removing flange hardware and hangers.
- Loosely assemble the new sections first so the pipes, hangers, and N1 tip can be aligned.
- Check clearance around the chassis, heat shields, suspension, and rear bumper before tightening the system.
- Start the engine, listen for leaks or contact, and recheck alignment after the first complete heat cycle.
Technician's Note
Do not fully tighten each joint as soon as it is installed. Leaving the connections slightly loose until every hanger is seated makes it much easier to center the tip and prevent the pipe from touching a heat shield or crossmember.
What's Included
- T-304 stainless steel cat-back exhaust piping
- N1-style muffler and 3.8-inch outlet tip
- TIG-welded flange connections
- All required installation hardware
Inspect every component before removing the factory exhaust. If anything appears damaged or missing, contact FLASHARK support before beginning installation.
Shipping & Returns
Free U.S. Shipping: Orders are typically processed within 1–2 business days and delivered within 7–9 business days. Additional charges may apply to remote areas.
30-Day Returns: Unopened and unused items in their original packaging may be returned within 30 days of receipt. Return shipping is covered for verified quality issues.
Worry-Free Delivery: Optional protection against eligible loss, theft, delay, or transit damage is available at checkout.
Fitment & Compatibility
- Fits factory-equipped vehicles with listed configurations.
- ✅Please confirm vehicle specifications before ordering.
| YEAR | MAKE | MODEL | ENGINE | BODY |
|---|---|---|---|---|
| 2016-2021 | Honda | Civic | 1.5L L4 | Sedan — 4 Door |
Frequently Asked Questions About the FLASHARK Honda Civic 1.5T Cat-Back Exhaust
Q1: Will this exhaust fit my Honda Civic?
A1: It fits compatible 2016-2021 Honda Civic Sedans with the factory 1.5L turbocharged engine, excluding the Civic Si. Confirm both the Sedan body style and 1.5L turbo engine before ordering. A year or trim badge by itself is not enough to verify fitment.
Q2: Will it fit a Civic with the 2.0L engine?
A2: No. The 2.0L naturally aspirated Civic uses a different exhaust configuration. This system is for the specified 1.5L turbo Sedan application only.
Q3: Does it fit a Civic Hatchback, Coupe, Si, or Type R?
A3: No. Those body styles and performance variants can have different pipe lengths, routing, hangers, flanges, and bumper exits. Sharing a model year or a 1.5L engine does not make the exhaust systems interchangeable.
Q4: I have a Civic EX, EX-L, or Touring. How do I confirm fitment?
A4: Check the body style and factory engine rather than relying only on the trim name. The car must be a 2016-2021 Sedan with the factory 1.5L turbo engine and must not be an Si. If you are unsure, send the model year, VIN, engine, and a photo of the original exhaust layout to FLASHARK before purchase.
Q5: How loud is the N1-style exhaust?
A5: Expect a deeper, more aggressive tone than the stock exhaust, especially during cold start and acceleration. Cruising volume depends on RPM, transmission, vehicle load, and other exhaust parts. Listen to the customer audio on this page with headphones for a more useful reference.
Q6: Will there be highway drone?
A6: Some cabin resonance can occur with any freer-flowing N1-style system. CVT operation and sustained engine speed can make certain frequencies more noticeable, so cabin sound should be expected to vary from car to car.
Q7: Is this a direct bolt-on installation?
A7: Yes. On a compatible vehicle, the system bolts into the intended mounting locations without cutting, welding, or custom fabrication. Loosely assemble all sections before final tightening so the hangers and tip can be aligned correctly.
Q8: How long does installation take?
A8: Typical installation time is about 1-2 hours with safe access under the vehicle. Rusted factory fasteners, damaged hangers, limited working space, or previous exhaust modifications can add time.
Q9: Does the kit include the installation hardware?
A9: Yes. All required installation hardware is included. Inspect the parts and hardware before removing the factory system so any shipping issue can be resolved before the car is taken apart.
Q10: Can I install it at home?
A10: A mechanically experienced owner can complete the job with common hand tools and safe lifting equipment. Use ramps or properly rated jack stands on level ground, support the original exhaust during removal, and never work under a car held only by a jack. If you are not comfortable working underneath the vehicle, use a professional exhaust shop.
Q11: What does professional installation usually cost?
A11: A typical shop quote may fall around $150-$300, but labor rates, corrosion, local taxes, and the condition of the original hardware can change the final cost. Ask the installer to confirm the quote after inspecting the car.
Q12: Will this cat-back exhaust cause a check engine light?
A12: A cat-back system installs downstream of the factory catalytic converter and oxygen sensors, so it normally does not require sensor changes or trigger a CEL by itself. Exhaust leaks, damaged wiring, unrelated engine faults, or other modifications can still illuminate the warning light and should be diagnosed rather than assumed to be normal.
Q13: Do I need a tune after installation?
A13: A tune is not normally required for this cat-back installation because it does not replace the factory catalytic converter or oxygen sensors. If the car also has a downpipe, front pipe, intake, or other engine modifications, tuning requirements should be evaluated for that complete setup.
Q14: How much horsepower will it add?
A14: Actual power change depends on the vehicle, tune, fuel, test method, and other modifications. The main reasons to choose this system are its freer-flowing layout, N1-style sound, T-304 stainless construction, and appearance; a fixed horsepower gain is not promised without a documented same-car dyno test.
Q15: Will it improve fuel economy?
A15: Fuel economy is influenced far more by speed, traffic, temperature, tires, vehicle condition, and driving style. Do not purchase the system expecting a fixed MPG increase.
Q16: What should I check after installation?
A16: Verify that the tip is centered, the hangers are fully seated, and the piping clears the bumper, heat shields, suspension, and chassis. Listen for leaks or metallic contact, then recheck the connections and alignment after the first full heat cycle.
Q17: Can I see the exhaust installed and hear the sound before buying?
A17: Yes. Review the installation images and customer audio on this page. Sound recordings vary by microphone and playback device, but they are more useful than relying on descriptions such as “deep” or “aggressive” alone.