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Product Details
| Part Number: | HS12HC2G3S |
| Brand: | Invidia |
| Color: | Polished |
| Size: | 2.75 in (70 mm) |
| Body Type: | Coupe |
Invidia Q300 Cat-Back Exhaust (Part Number HS12HC2G3S) — for 2012-2015 Honda Civic Si Coupe. Take your Civic Si coupe to the next level with the Invidia Q300 cat-back system. Crafted from premium materials and engineered for performance, this exhaust delivers enhanced sound, improved flow, and a refined yet aggressive aesthetic. Ideal for drivers who want both street usability and spirited driving capability.
Features:
- Full 70 mm (2.75″) mandrel-bent piping — Ensures smooth exhaust flow and minimizes restriction compared to stock.
- 304 stainless steel construction — Durable and corrosion-resistant for long-term reliability.
- Polished rolled stainless steel single exit tip (≈110 mm diameter) — Bold aesthetic finish that complements the rear bumper and enhances visual appeal.
- Flat-bottom shaped muffler design — Optimized for aerodynamic clearance and aggressive under-body posture, while maintaining refined exhaust tone.
- Robot TIG-welded and CNC-machined flanges — Professional build quality ensures a precise fit and superior sealing.
- Bolt-on fitment for the 2012-2015 Honda Civic Si Coupe (K24 engine, 2.4L naturally aspirated) — Direct replacement for stock exhaust with minimal modifications.
- Aggressive yet usable sound profile — Deep sporty tone under throttle, with controlled resonance at cruise to keep it street-friendly.
- 1-Year manufacturer warranty — Backing from Invidia for material and workmanship confidence.
WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects. www.P65Warnings.ca.gov.
Vehicle Fitment
| Year | Make | Model | Trim | Notes |
|---|---|---|---|---|
| 2012 | Honda | Civic | Si | Coupe |
| 2013 | Honda | Civic | Si | Coupe |
| 2014 | Honda | Civic | Si | Coupe |
| 2015 | Honda | Civic | Si | Coupe |
2 Reviews ★★★★★
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Mario Martinez | April 14th, 2022
Excellent fit ,great communication , and on top of restock
Peter | March 8th, 2015
This product has great quality for the price. Usually spending over $700 will net you a great catback. This does it for less. You can cruise by the police with no problem. You want to open the throttle up a bit? Go ahead. It's not loud so much as deep. Smooth bass tones are what this exhaust sings. Pairs awesome with a downpipe.
