---
product_id: 10585568
title: "Flowmaster 817637 13-18 Ford Focus St Amt 409s Exhaust System"
brand: "flowmaster"
price: "€ 1883.67"
currency: EUR
in_stock: true
url: https://www.desertcart.fi/products/10585568-flowmaster-817637-13-18-ford-focus-st-amt-409s-exhaust
store_origin: FI
region: Finland
---

# Stainless steel durability Dyno-tuned aggressive sound Bolt-on easy installation Flowmaster 817637 13-18 Ford Focus St Amt 409s Exhaust System

**Brand:** flowmaster
**Price:** € 1883.67
**Availability:** ✅ In Stock

## Summary

> 🚗 Unleash your Focus ST’s roar with Flowmaster precision!

## Quick Answers

- **What is this?** Flowmaster 817637 13-18 Ford Focus St Amt 409s Exhaust System by flowmaster
- **How much does it cost?** € 1883.67 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/10585568-flowmaster-817637-13-18-ford-focus-st-amt-409s-exhaust)

## Best For

- flowmaster enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Crafted from mandrel-bent stainless steel tubing for superior corrosion resistance and longevity.
- • **Performance Meets Style:** Polished oval stainless steel tips add a sleek, aggressive look to your ride’s rear profile.
- • **Precision Engineered Fit:** Bolt-on design tailored specifically for 2013-2018 Ford Focus ST hatchbacks—no modifications needed.
- • **Complete Installation Kit:** Includes all necessary hardware for a hassle-free upgrade—get on the road faster.
- • **Powerful Sound, Perfected:** Experience moderate to aggressive exhaust notes tuned for maximum performance.

## Overview

The Flowmaster 817637 American Thunder cat-back exhaust system is a direct-fit upgrade for 2013-2018 Ford Focus ST hatchbacks, featuring dyno-tuned mufflers and resonators for a moderate to aggressive sound. Constructed from durable 2.25-inch mandrel-bent stainless steel tubing with polished oval tips, it delivers enhanced performance and style while ensuring easy bolt-on installation with included hardware.

## Description

Flowmaster's American Thunder cat-back exhaust system for the 2013-2018 Ford Focus ST hatchback is perfect for the person looking for moderate to aggressive sound levels with all of the performance benefits that you would expect from Flowmaster. This bolt on Dual Out Rear emissions legal system for the 2.0L L4 turbocharged engine features a specially tuned muffler and resonator, 2.25 inch mandrel bent stainless steel tubing, and 3.25 x 3.75 inch oval polished stainless steel tips. Designed for an easy fit, this system includes all necessary parts and hardware for installation.

## Features

- Great Performance Sound
- Dyno Tuned For Maximum Performance
- Stainless Steel Construction
- Moderate to aggressive sound
- Easy Installation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Flowmaster |
| Brand | Flowmaster |
| Model | 817637 |
| Item Weight | 48 pounds |
| Item model number | 817637 |
| Is Discontinued By Manufacturer | No |
| Exterior | Painted |
| Manufacturer Part Number | 817637 |
| OEM Part Number | 817637 |

## Images

![Flowmaster 817637 13-18 Ford Focus St Amt 409s Exhaust System - Image 1](https://m.media-amazon.com/images/I/41scoNkyWIL.jpg)
![Flowmaster 817637 13-18 Ford Focus St Amt 409s Exhaust System - Image 2](https://m.media-amazon.com/images/I/51iMPl2fMIL.jpg)
![Flowmaster 817637 13-18 Ford Focus St Amt 409s Exhaust System - Image 3](https://m.media-amazon.com/images/I/410OrZffd5L.jpg)
![Flowmaster 817637 13-18 Ford Focus St Amt 409s Exhaust System - Image 4](https://m.media-amazon.com/images/I/61n569e5F3L.jpg)

## Available Options

This product comes in different **Style** options.

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**Shop now:** [https://www.desertcart.fi/products/10585568-flowmaster-817637-13-18-ford-focus-st-amt-409s-exhaust](https://www.desertcart.fi/products/10585568-flowmaster-817637-13-18-ford-focus-st-amt-409s-exhaust)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-20*