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SKU: HS12HC4G3S
Invidia 2012-2015 Honda Civic Si Sedan Q300 Rolled Stainless Steel Tip Cat-back Exhaust
The Invidia Q300 cat-back exhaust system HS12HC4G3S replaces the factory exhaust from the catalytic converter back on 2012-2015 Honda Civic Si Sedans. This setup uses 60mm mandrel-bent T304 stainless steel piping to improve exhaust flow and deliver noticeable horsepower increases of 8-10 wheel horsepower along with a deep aggressive exhaust note. Drivers enjoy enhanced throttle response and a refined sound profile without excessive cabin drone.
Key Features
- T304 Stainless Steel Build: Full construction from high-grade T304 stainless steel resists corrosion and withstands high heat for long-term durability.
- Mandrel-Bent 60mm Piping: Smooth bends maintain consistent diameter to boost exhaust scavenging and engine breathing efficiency.
- Dual Rolled Stainless Tips: 101mm outer by 85mm inner rolled-edge tips provide a clean OEM-plus look with substantial presence.
- Q300 Single Wall Design: Delivers a throaty deep tone that intensifies with RPM while keeping interior noise comfortable on highways.
- Direct Bolt-On Fit: Precision engineering ensures hassle-free installation using factory hanger locations on Civic Si Sedans.
Product Notes
- System weighs 28 pounds for balanced performance without excess weight.
- Clean regularly with mild soap to maintain stainless steel finish.
- Packages in a sturdy box measuring 48 x 12 x 12 inches for secure transit.
Installation Notes
- Professional installation recommended.
- Requires basic tools like jack stands and exhaust clamps for 2-3 hour install.
- Uses all factory mounting points and hangers with included gaskets and hardware.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2012-2015 | Honda | Civic | Si Sedan |
Why Choose Invidia?
- Established leader in JDM aftermarket exhaust since 1998.
- Focuses on dyno-tested designs for real-world power and sound gains.
- Manufactures in-house for exact tolerances and quality control.
Frequently Asked Questions
-
Q: Will this fit 2012-2015 Honda Civic Si Coupe?
A: No this HS12HC4G3S fits only the 4-door Civic Si Sedan models use HS12HC4G3 for coupe. -
Q: What piping size and material does it use?
A: Features 60mm T304 stainless steel piping throughout with dual rolled stainless tips. -
Q: What warranty coverage applies?
A: Invidia provides a limited lifetime warranty on welds and material defects for manufacturing issues.
Shipping & Handling
- Method: Ground shipping via UPS or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Secure box 48 x 12 x 12 inches
- Weight: 28 pounds
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