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SKU: 31006-BH002 | UPC: 4957266931684
HKS 2017-2021 Honda Civic Si Sedan (FC) Hi-Power Muffler Exhaust
The HKS Hi-Power Muffler Exhaust (31006-BH002) bolts onto 2017-2021 Honda Civic Si Sedan models with FC chassis. This cat-back system uses larger piping for better exhaust flow, adding horsepower and torque while cutting weight. Drivers enjoy a refined deep tone that enhances the driving experience without cabin drone.
Key Features
- SUS304 Stainless Steel: Full construction resists corrosion and withstands high heat for long-term reliability on track or street.
- Titanium Rolled Tip: 120mm diameter polished tip adds lightweight style, reduces scorching, and matches Civic Si aesthetics.
- Optimized Pipe Diameter: 60.5mm inlet to 80 x 115mm dual outlet improves scavenging for measurable power gains over stock.
- Weight Reduction: 8.6kg system versus 12.4kg OEM muffler lowers rear weight for sharper handling and acceleration.
- Refined Sound Profile: Deep aggressive exhaust note at high RPM with low drone during cruise for everyday usability.
Product Notes
- Bolt-on design requires no cutting or welding for straightforward replacement.
- Inspect hangers and gaskets during install to ensure secure fit.
- Packaged to prevent shipping damage with protective wrapping.
Installation Notes
- Professional installation recommended.
- Direct bolt-on using factory mounts on FC chassis Civic Si Sedan.
- Includes all necessary gaskets, clamps, and hardware for complete assembly.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2017-2021 | Honda | Civic | Si Sedan (FC1/FC2) |
Why Choose HKS?
- Trusted JDM leader with decades of turbo and exhaust engineering expertise.
- Made in Japan with dyno-proven designs for real-world performance.
- Precision TIG-welded pipes ensure leak-free flow and consistent results.
Frequently Asked Questions
-
Q: Will this fit my 2017-2021 Honda Civic Si Sedan?
A: Yes, designed specifically for FC1/FC2 chassis with direct bolt-on fitment, no modifications needed. -
Q: What materials are used in construction?
A: SUS304 stainless steel piping paired with a titanium rolled 120mm tip for durability and reduced weight. -
Q: Is professional installation required?
A: Recommended for proper alignment and torque, though it's a straightforward cat-back swap using stock locations.
Shipping & Handling
- Method: UPS Ground or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Oversized box measuring 48 x 16 x 16 inches
- Weight: 21 lbs
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