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SKU: HS12HC2G3S
Invidia 2012-2015 Honda Civic Si Coupe K24 Q300 Rolled Stainless Steel Tip Cat-back Exhaust
The Invidia HS12HC2G3S Q300 cat-back exhaust system replaces the stock setup from the catalytic converter back on 2012-2015 Honda Civic Si Coupe models with K24Z7 engines. This full cat-back design uses mandrel-bent T304 stainless steel piping for unrestricted exhaust flow and gains in horsepower and torque up to 8-10 whp. Drivers notice sharper throttle response along with a deep refined exhaust note from the Q300 muffler canister.
Key Features
- T304 Stainless Steel Construction: Provides lasting durability and resistance to corrosion for long-term performance in all conditions.
- Mandrel-Bent 2.38-inch Piping: Ensures smooth exhaust flow to reduce backpressure and support power increases up to 8-10 whp.
- Q300 Muffler Design: Dual-wall canister delivers an aggressive yet refined tone without cabin drone on highways.
- 4-inch Rolled Stainless Steel Tips: Adds a sleek polished look with precise fitment to the factory bumper cutouts.
- Bolt-On Cat-Back Layout: Direct replacement using OEM hangers for straightforward gains over restrictive factory exhaust.
Product Notes
- Requires no cutting or welding for stock cat-back replacement.
- Break in exhaust for 100 miles before heavy track use to settle tone.
- Packages in heavy-duty box measuring 50 x 14 x 14 inches.
Installation Notes
- Professional installation recommended.
- Uses factory mounting points and rubber hangers for secure fit.
- Compatible with stock catalytic converter and headers.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2012-2015 | Honda | Civic | Si Coupe (FG2/FG6) |
Why Choose Invidia?
- Engineered in Japan with dyno-tested designs for Honda applications.
- Uses premium T304 stainless steel throughout for reliable daily driving.
- Proven exhaust flow improvements validated on multiple Civic Si builds.
Frequently Asked Questions
-
Q: Does HS12HC2G3S fit 2012-2015 Honda Civic Si Sedan?
A: No, this exhaust fits only Coupe models (FG2/FG6 chassis) with K24Z7 engine. Sedan requires HS12HC2G3ST. -
Q: What material is used in the piping and tips?
A: Full T304 stainless steel piping with single-wall rolled stainless steel tips in polished finish. -
Q: What is the warranty and install time?
A: 1-year manufacturer defect warranty. Bolt-on install takes 1-2 hours with basic tools for experienced mechanics.
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Single heavy-duty cardboard box 50 x 14 x 14 inches
- Weight: 24 lbs product weight, 35 lbs shipping weight
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