SKU: B184-C185
Thermal R&D Catback / Frontpipe Exhaust System – 2016+ Honda Civic Si Sedan
The Thermal R&D Catback / Frontpipe Exhaust System is a premium performance upgrade engineered specifically for the 2016+ Honda Civic Si Sedan with the 1.5L turbocharged engine.
This 3″ system (reducing to 2.5″ at the tailpipes) delivers an aggressive turbo growl during acceleration and launch while effectively eliminating drone during cruising thanks to Thermal R&D’s signature True Helmholtz Technology (THT) and a resonated mid-pipe.
Constructed from high-quality T304 stainless steel, the system features a mill finish on the front pipe, tubing, and resonator, paired with a brushed muffler and a polished tip that fills out the OEM valance and bumper for a clean, upgraded appearance.
The design retains all factory hangers for a direct bolt-on installation with no cutting or modifications required. This exhaust gives Civic Si owners the perfect balance of enhanced sound, improved flow, and refined performance.
Key Features
- 3″ to 2.5″ Dual Exhaust – Optimized sizing for improved flow and performance
- True Helmholtz Technology (THT) – Aggressive acceleration sound with drone-free cruising
- Resonated Mid-Pipe – Further reduces unwanted drone while preserving turbo note
- T304 Stainless Steel Construction – Excellent corrosion resistance and durability
- Polished Tip Upgrade – Designed to complement the OEM valance and bumper
- Direct Bolt-On Fitment – Retains factory hangers for easy installation
- Brushed Muffler Finish – Clean, sporty appearance with mill finish tubing
| Spec | Detail |
|---|---|
| Part Number | B184-C185 |
| Brand | Thermal R&D |
| Type | Catback / Frontpipe Exhaust System |
| Compatibility | 2016+ Honda Civic Si Sedan (1.5L Turbo) |
| Piping Size | 3″ reducing to 2.5″ |
| Material | T304 Stainless Steel |
| Finish | Mill Finish (front pipe, tubing, resonator) / Brushed Muffler / Polished Tip |
| Technology | True Helmholtz Technology (THT)™ for drone cancellation |
| Country of Origin | United States |
| Warranty | Thermal R&D Lifetime Warranty |
Whats Included
- Complete Catback / Frontpipe Exhaust System (including muffler, resonator, and tailpipes)
- All necessary hardware and clamps
- Installation instructions
Product Notes
- Specifically designed for the 2016+ Honda Civic Si Sedan (1.5L Turbo)
- Engineered to work with the factory valance and bumper
- Professional installation recommended for best results
Installation Notes
- Direct bolt-on installation using factory hangers
- Estimated time: 2–4 hours
- Professional installation recommended
This Part Fits
| Year Range | Make | Model | Engine | Notes |
|---|---|---|---|---|
| 2016+ | Honda | Civic Si Sedan | 1.5L Turbo | Catback / Frontpipe Exhaust System |
Why Choose Thermal R&D Exhaust Systems?
- Premium T304 stainless steel construction for long-term durability
- Advanced True Helmholtz Technology (THT)™ for the ideal balance of aggressive sound and drone-free cruising
- Perfect fitment designed to complement the factory bumper and valance
- Lifetime warranty and trusted performance in the Honda tuning community
Frequently Asked Questions
- Q: Will this exhaust fit my 2020 Honda Civic Si Sedan?
A: Yes, it is designed for all 2016+ Honda Civic Si Sedan models with the 1.5L turbo engine. - Q: Does this system include a muffler?
A: Yes, it is a complete catback/frontpipe system that includes the muffler, resonator, and tailpipes. - Q: Is the exhaust drone-free?
A: Yes, Thermal R&D’s True Helmholtz Technology (THT)™ effectively cancels drone at cruising speeds while preserving an aggressive turbo growl on acceleration. - Q: Is professional installation recommended?
A: Yes, professional installation ensures proper fitment and leak-free performance.
Shipping & Handling
- Method: Ground UPS or FedEx (oversize may apply)
- Availability: In stock – ships same or next business day
- Packaging: Secure Thermal R&D retail packaging
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