---
product_id: 17377363
title: "Flowmaster 817658 American Thunder Cat-back Exhaust System"
brand: "flowmaster"
price: "21487 kr"
currency: DKK
in_stock: true
reviews_count: 8
category: "Flowmaster"
url: https://www.desertcart.dk/products/17377363-flowmaster-817658-american-thunder-cat-back-exhaust-system
store_origin: DK
region: Denmark
---

# Dyno Tuned for Max Performance 409 Stainless Steel Tubing Bolt-On Installation Flowmaster 817658 American Thunder Cat-back Exhaust System

**Brand:** flowmaster
**Price:** 21487 kr
**Availability:** ✅ In Stock

## Summary

> 🚗 Unleash the Thunder: Command the Road with Every Roar!

## Quick Answers

- **What is this?** Flowmaster 817658 American Thunder Cat-back Exhaust System by flowmaster
- **How much does it cost?** 21487 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/17377363-flowmaster-817658-american-thunder-cat-back-exhaust-system)

## 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

- • **Lifetime Confidence:** Backed by Flowmaster’s Lifetime Limited Warranty for enduring performance and peace of mind.
- • **Iconic American Thunder:** Transforms your Dodge Charger R/T or Chrysler 300 into a head-turning powerhouse with signature Flowmaster sound.
- • **Seamless Fit, Easy Install:** Uses factory hanger locations and includes all hardware for a hassle-free bolt-on upgrade.
- • **Aggressive Sound, Zero Drone:** Super 44 mufflers deliver a deep, commanding growl without cabin noise distractions.
- • **Precision Engineered for Power:** Mandrel-bent 2.5-inch tubing and Scavenger Series X-pipe optimize exhaust flow and horsepower.

## Overview

The Flowmaster 817658 American Thunder Cat-back Exhaust System is a premium bolt-on upgrade designed for 2015-2016 Dodge Charger R/T and 2015-2018 Chrysler 300 with 5.7L V8 engines. Featuring mandrel-bent 409 stainless steel tubing, a scavenger series X-pipe, and Super 44 mufflers, it delivers a deep, aggressive exhaust note while maintaining a quiet cabin. Dyno tuned for maximum performance and backed by a lifetime limited warranty, this system ensures a perfect fit using factory hangers and includes all necessary hardware for straightforward installation.

## Description

Flow master's American Thunder Cat-back exhaust system for the 2015-2016 Dodge Charger R/T with the 5. 7L V8 engine and 2015-2018 Chrysler 300 with 5. 7L V8 engine is perfect for the person looking for an aggressive exterior and interior sound level with all of the performance benefits that you would expect from Flow master. This bolt-on 409S stainless steel system features a pair of Super 44 Series mufflers for a deep, aggressive sound. The system uses a 2. 50 inch Scavenger Series X-Pipe and mandrel bent tubing for maximum performance and then is finished off with 2. 50 inch stainless steel tips that exit within the rear bumper valence. The exhaust system is covered by Flow master's Lifetime Limited . Designed for an easy fit, this system includes all necessary parts and hardware for installation.

Review: Hemi go vroom - sounds great! quiet inside the cab
Review: Unbelievable! - I just installed this kit on my 2022 300s with the Hemi and let me tell you, this car sounds amazing. Install was pretty straightforward and was done in my garage by myself. Another person would definitely been helpful, but I managed. As others have said, the hardest part was removing the stock system. Once that was completed, installing the Flowmaster was a breeze. Sound is deep and mellow and I didn’t sense any drone. Definitely worth the money and time to have that Hemi growl. If you are still in the fence about purchasing, pull the trigger and get it, you won’t be disappointed!

## Features

- Exclusive Scavenger Series Cross-over X-Pipe
- Mandrel-bent 409 Stainless Steel Tubing
- Dyno Tuned For Maximum Performance
- Uses the Factory Hanger Locations
- Super 44 Performance Mufflers

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00XVRU1GC |
| Best Sellers Rank | #3,775,899 in Automotive ( See Top 100 in Automotive ) #2,271 in Automotive Replacement Exhaust Cat-Back Systems #23,362 in Automotive Performance Parts & Accessories |
| Brand | Flowmaster |
| Brand Name | Flowmaster |
| Color | Black muffler, Silver tubing |
| Compatible with Vehicle Type | Car |
| Customer Reviews | 4.8 out of 5 stars 20 Reviews |
| Global Trade Identification Number | 00700042032259 |
| Included Components | Flowmaster 817658 Exhaust System Kit |
| Installation Type | Bolt-On |
| Item Type Name | Flowmaster 817658 Exhaust System Kit |
| Item Weight | 56 Pounds |
| Manufacturer | Flowmaster |
| Manufacturer Part Number | 817658 |
| Manufacturer Warranty Description | Lifetime Limited Warranty |
| Material | Plastic |
| Material Type | Plastic |
| Shape | Oval |
| UPC | 700042032068 700042032259 |
| Unit Count | 1.0 Count |
| Vehicle Service Type | Car |

## Product Details

- **Color:** Black muffler, Silver tubing
- **Brand:** Flowmaster
- **Material:** Plastic
- **Vehicle Service Type:** Car
- **Shape:** Oval

## Images

![Flowmaster 817658 American Thunder Cat-back Exhaust System - Image 1](https://m.media-amazon.com/images/I/610oWFCV-+L.jpg)
![Flowmaster 817658 American Thunder Cat-back Exhaust System - Image 2](https://m.media-amazon.com/images/I/614JlEVKbJL.jpg)
![Flowmaster 817658 American Thunder Cat-back Exhaust System - Image 3](https://m.media-amazon.com/images/I/615D15BB0SL.jpg)
![Flowmaster 817658 American Thunder Cat-back Exhaust System - Image 4](https://m.media-amazon.com/images/I/61VDht50-3L.jpg)
![Flowmaster 817658 American Thunder Cat-back Exhaust System - Image 5](https://m.media-amazon.com/images/I/61n569e5F3L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Hemi go vroom
*by J***K on July 4, 2025*

sounds great! quiet inside the cab

### ⭐⭐⭐⭐⭐ Unbelievable!
*by J***N on April 2, 2023*

I just installed this kit on my 2022 300s with the Hemi and let me tell you, this car sounds amazing. Install was pretty straightforward and was done in my garage by myself. Another person would definitely been helpful, but I managed. As others have said, the hardest part was removing the stock system. Once that was completed, installing the Flowmaster was a breeze. Sound is deep and mellow and I didn’t sense any drone. Definitely worth the money and time to have that Hemi growl. If you are still in the fence about purchasing, pull the trigger and get it, you won’t be disappointed!

### ⭐⭐⭐⭐ Great Sound in 8, But Not 4 Cylinder Mode
*by J***. on January 14, 2017*

Fits my 2016 Dodge Charger R/T well. Not perfect mind you. The cross bars by the original mid mufflers needed to be lowered on reinstall to clear the new exhaust. This was not hard by any sense of the word, just a matter of placing a spacer (8 spare nuts) before reinstalling the cross bars. This exhaust is aggressive in its sound. Was louder than I thought it would be at first. But after a couple of weeks, not that bad. It sounds great at idle and when you put your foot down. When your engine goes into four cylinder mode, it does have a weird drone noise to it which is why it gets 4 stars and not 5. Would purchase again.

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**Shop now:** [https://www.desertcart.dk/products/17377363-flowmaster-817658-american-thunder-cat-back-exhaust-system](https://www.desertcart.dk/products/17377363-flowmaster-817658-american-thunder-cat-back-exhaust-system)

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-06-04*