---
product_id: 15050792
title: "(HS12HC4G3S) Q300 Cat-Back Exhaust System with Stainless Steel Rolled Tip for Honda Civic Si Sedan"
brand: "invidia"
price: "8688.89 DT"
currency: TND
in_stock: true
reviews_count: 4
category: "Invidia"
url: https://www.desertcart.tn/products/15050792-hs12hc4g3s-q300-cat-back-exhaust-system-with-stainless-steel-rolled
store_origin: TN
region: Tunisia
---

# 70mm mandrel-bent piping Optimized back pressure for horsepower & torque Robot TIG welded SUS304 stainless steel (HS12HC4G3S) Q300 Cat-Back Exhaust System with Stainless Steel Rolled Tip for Honda Civic Si Sedan

**Brand:** invidia
**Price:** 8688.89 DT
**Availability:** ✅ In Stock

## Summary

> 🚗 Unleash your Civic Si’s roar with precision-crafted power and style!

## Quick Answers

- **What is this?** (HS12HC4G3S) Q300 Cat-Back Exhaust System with Stainless Steel Rolled Tip for Honda Civic Si Sedan by invidia
- **How much does it cost?** 8688.89 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/15050792-hs12hc4g3s-q300-cat-back-exhaust-system-with-stainless-steel-rolled)

## Best For

- invidia enthusiasts

## Why This Product

- Trusted invidia brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Aerodynamic Edge:** Flat bottom muffler design boosts high-speed airflow and performance
- • **Power & Sound Upgrade:** Advantex material muffler delivers deep, sporty tone without drone
- • **Precision Engineering:** Mandrel bent piping with CNC flanges ensures perfect fit and flow
- • **Durability Meets Style:** Polished SUS304 stainless steel and double-wall tips for lasting shine
- • **Effortless Installation:** Comes with all hardware and gaskets for a seamless upgrade experience

## Overview

The Invidia Q300 Cat-Back Exhaust System (HS12HC4G3S) for Honda Civic Si Sedan features 70mm mandrel-bent SUS304 stainless steel piping, a flat bottom muffler for improved aerodynamics, and advanced Advantex material for optimized back pressure. Engineered with CNC flanges and robot TIG welding, it delivers enhanced horsepower, torque, and a rich sporty sound with durable polished stainless steel or titanium tips. Designed for easy installation, it’s the ultimate upgrade for performance and style.

## Description

The flat bottom shaped muffler design results in improved high speed aerodynamic performance. The muffler inside contains continuous piping design and use of Advantex material that results in an excellent free-flow exhaust with optimized back pressure, giving greater horsepower, torque gains and a rich deep sporty sound. The use of SUS304 polished stainless steel piping, Mandrel bent to shape, state of the art CNC machine made flange, Robot TIG welding and double wall polished stainless steel or Titanium tips, provides outstanding durability and appearance.

Review: great no rasp or drone - nice sound on fb6 2014
Review: Well worth the money - This was the easiest installation I've had for exhaust in a long time, maybe ever. Fit great, came with needed hardware and gaskets, not terribly loud, and looks almost factory.

## Features

- Package Dimensions: 29.845 H x 151.765 L x 45.72 W (centimeters)
- Package Weight: 49.15 pounds
- Piping diameter: 70 millimeter
- Country of Origin : Taiwan

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00BT875P0 |
| Best Sellers Rank | #2,575,837 in Automotive ( See Top 100 in Automotive ) #1,235 in Automotive Replacement Exhaust Cat-Back Systems |
| Brand | Invidia |
| Customer Reviews | 5.0 5.0 out of 5 stars (18) |
| Date First Available | March 13, 2013 |
| Item Weight | 40 pounds |
| Item model number | HS12HC4G3S |
| Manufacturer | Invidia |
| Manufacturer Part Number | HS12HC4G3S |
| Model | HS12HC4G3S |
| OEM Part Number | INV-HS12HC4G3S |

## Images

![(HS12HC4G3S) Q300 Cat-Back Exhaust System with Stainless Steel Rolled Tip for Honda Civic Si Sedan - Image 1](https://m.media-amazon.com/images/I/51TxJ+HLBSL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ great no rasp or drone
*by S***A on June 26, 2025*

nice sound on fb6 2014

### ⭐⭐⭐⭐⭐ Well worth the money
*by J***H on March 17, 2024*

This was the easiest installation I've had for exhaust in a long time, maybe ever. Fit great, came with needed hardware and gaskets, not terribly loud, and looks almost factory.

### ⭐⭐⭐⭐⭐ 2015 Civic Si Sedan
*by B***1 on May 23, 2015*

I ordered this for a 2015 Civic Si Sedan. It fits like a glove and the sound is amazing. The quality of the exhaust is insane compared to the stock one that came with my Si. Sound is there but its not an obnoxious ricer sound, the best way i could describe it is that its deep throaty groan that will literally put a smile on your face as your brain translates it to pure performance. I do not have a single regret ordering this exhaust.

## Frequently Bought Together

- Invidia (HS12HC4G3S) Q300 Cat-Back Exhaust System with Stainless Steel Rolled Tip for Honda Civic Si Sedan
- Acuity Shift Linkage Bushing Upgrade for the 2007-2017 Honda Civic Si, 2007-2017 Civic (MT), 2015-2017 Honda Fit (MT)
- Rev9 R9-HS2-011_2 Hyper-Street II Coilover Suspension Lowering Kit, Mono-Tube Shock w/ 32 Click Rebound Setting, Full Length Adjustable, compatible with Honda Civic Si (FG/FB) 2012-13

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**Shop now:** [https://www.desertcart.tn/products/15050792-hs12hc4g3s-q300-cat-back-exhaust-system-with-stainless-steel-rolled](https://www.desertcart.tn/products/15050792-hs12hc4g3s-q300-cat-back-exhaust-system-with-stainless-steel-rolled)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-15*