---
product_id: 8357931
title: "Flowmaster 817674 American Thunder Cat-back Exhaust System"
brand: "flowmaster"
price: "13764 DH"
currency: MAD
in_stock: true
reviews_count: 8
category: "Flowmaster"
url: https://www.desertcart.ma/products/8357931-flowmaster-817674-american-thunder-cat-back-exhaust-system
store_origin: MA
region: Morocco
---

# Premium 409S stainless steel Quick & easy install Max clearance for off-road Flowmaster 817674 American Thunder Cat-back Exhaust System

**Brand:** flowmaster
**Price:** 13764 DH
**Availability:** ✅ In Stock

## Summary

> 🛠️ Elevate your Jeep’s roar and ride—because ordinary exhausts are for ordinary drivers.

## Quick Answers

- **What is this?** Flowmaster 817674 American Thunder Cat-back Exhaust System by flowmaster
- **How much does it cost?** 13764 DH with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ma](https://www.desertcart.ma/products/8357931-flowmaster-817674-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

- • **Built to Endure:** Crafted from durable 409S stainless steel for long-lasting corrosion resistance and style.
- • **Effortless DIY Upgrade:** Designed for a seamless install using factory hangers—no pro needed, just your passion.
- • **Unleash Off-Road Freedom:** Maximized ground clearance lets you conquer rugged trails without compromise.
- • **Precision Fit for Jeep Wranglers:** Tailored for 2007-2014 3.6L & 3.8L V6 models, ensuring flawless integration and performance.
- • **Signature American Thunder Sound:** Super HP2 laminar flow tech delivers that perfect moderate-to-aggressive growl—turn heads, not neighbors.

## Overview

The Flowmaster 817674 American Thunder Cat-back Exhaust System is a premium 409S stainless steel upgrade engineered for 2007-2014 Jeep Wranglers with 3.6L and 3.8L V6 engines. Featuring Super HP2 laminar flow technology and factory hanger compatibility, it offers enhanced ground clearance for off-road adventures, a signature aggressive yet refined exhaust note, and a straightforward installation process. Backed by Flowmaster’s lifetime limited warranty, this system transforms your Jeep’s performance and sound with durable, precision-crafted components.

## Description

Flowmasters new American Thunder cat-back system for the 2007-2014 Jeep Wranglers is perfect for the person looking for maximum performance and ground clearance from their exhaust system. This 2.50 inch system features a 409S stainless steel mandrel bent tailpipe with a 3.00 inch polished stainless steel tip and fits both 2 and 4 door models with the 3.6L and 3.8L V6 engines. This system replaces the factory transverse muffler and relocates the Super HP-2 muffler behind the factory catalytic converter, providing a moderate to aggressive sound level. This relocation allows for better ground clearance when driving off-road. Because the tailpipe is tucked up so high, an aftermarket metal bumper is recommended. The exhaust system is manufactured in the USA and is covered by Flowmaster's Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation.

Review: Very happy with my 3.8's new heart and sound - Installed on my 2009 Wrangler JKU with the 3.8 and it sounds amazing! I have always been against putting an exhaust on a v6 but this was worth it. you will have clearance issues on your rear sway bar and your frame. you can either buy the drop brackets or add some washers in there to move the sway bar down just a hair. you don't have to do either one really but you may get a rattle every now and then. I ran mine without moving the sway bar a few days but then went back and slid some washers in between the bracket and the frame just to keep that occasional rattle from coming about. seems like it only happened when someone was checking out the jeep lol. Very easy install. The Uninstall of the old exhaust was the hardest part.... mainly getting the hangers out to drop the old exhaust... I sprayed some PB Blaster on the rubbers to provide a little lube... made the job much easier but was still a pain. my old pipes were seemingly welded together by the heat that passes through them lol so some KROIL and a little elbow grease and they all separated in the end. install probably took about 2 hrs working on the ground with no jacks necessary and a couple of buddies for a few good laughs Installed with the Rugged Ridge XHD Snorkel, SuperChips Flashpaq 3872, AFE Silver Bullet Throttle Body Spacer, and Rugged Ridge High flow air filter. Very happy with overall results. Extremely happy with my new exhaust. no drone. I have floor plugs out and it isn't bad at all! has the sound of a jeep without a muffler, just not as loud. very sexy!
Review: Great Kit some fitment needed. - This is as you would expect a FLOWMASTER exhaust kit. Its louder than stock and completely DIY no need to pay installation. Some of the reviews make you wonder? Of course its loud, thats the point! Either way all of the problems I noticed in some of the other reviews are fitment issues. This exhaust does require some fitment, but nothing complicated and a hack saw won't fix. I removed approx. 1 1/4 from the Y to Inlet tube which allowed the box itself to slide between supports and prevent any rattling or knocking and allows full clearance at the back when installing final piece with chrome tip attached. I also removed the rear sway to make the installation easier, a quick five minutes removing this can prevent 30 minutes of trying to squeeze the pipe in place.

## Features

- Provides Maximum Clearance for Off-Road Driving
- Super HP2 Laminar Flow Technology
- Uses the Factory Hanger Locations
- Stainless Steel Construction
- Quick and Easy Installation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00FMN7V0W |
| Best Sellers Rank | #900,251 in Automotive ( See Top 100 in Automotive ) #18 in Automotive Performance Cat-Back Exhaust Systems |
| Brand Name | Flowmaster |
| Color | Multicolor |
| Customer Reviews | 4.2 4.2 out of 5 stars (246) |
| Global Trade Identification Number | 00700042030385 |
| Included Components | Flowmaster 817674 American Thunder 409S Single Rear Exit Cat-Back System with Moderate Sound |
| Item Type Name | Flowmaster 817674 American Thunder 409S Single Rear Exit Cat-Back System with Moderate Sound |
| Item Weight | 23.5 Pounds |
| Manufacturer | Flowmaster |
| Manufacturer Part Number | 817674 |
| Manufacturer Warranty Description | Check with the manufacturer |
| Material Type | Plastic |
| UPC | 700042030385 |
| Unit Count | 1.0 Count |

## Product Details

- **Automotive Fit Type:** Vehicle Specific Fit
- **Brand:** Flowmaster
- **Color:** Multicolor
- **Manufacturer:** Flowmaster
- **Material:** Plastic

## Images

![Flowmaster 817674 American Thunder Cat-back Exhaust System - Image 1](https://m.media-amazon.com/images/I/61FeX3S6EyL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very happy with my 3.8's new heart and sound
*by D***. on January 20, 2015*

Installed on my 2009 Wrangler JKU with the 3.8 and it sounds amazing! I have always been against putting an exhaust on a v6 but this was worth it. you will have clearance issues on your rear sway bar and your frame. you can either buy the drop brackets or add some washers in there to move the sway bar down just a hair. you don't have to do either one really but you may get a rattle every now and then. I ran mine without moving the sway bar a few days but then went back and slid some washers in between the bracket and the frame just to keep that occasional rattle from coming about. seems like it only happened when someone was checking out the jeep lol. Very easy install. The Uninstall of the old exhaust was the hardest part.... mainly getting the hangers out to drop the old exhaust... I sprayed some PB Blaster on the rubbers to provide a little lube... made the job much easier but was still a pain. my old pipes were seemingly welded together by the heat that passes through them lol so some KROIL and a little elbow grease and they all separated in the end. install probably took about 2 hrs working on the ground with no jacks necessary and a couple of buddies for a few good laughs Installed with the Rugged Ridge XHD Snorkel, SuperChips Flashpaq 3872, AFE Silver Bullet Throttle Body Spacer, and Rugged Ridge High flow air filter. Very happy with overall results. Extremely happy with my new exhaust. no drone. I have floor plugs out and it isn't bad at all! has the sound of a jeep without a muffler, just not as loud. very sexy!

### ⭐⭐⭐⭐⭐ Great Kit some fitment needed.
*by K***Y on September 11, 2017*

This is as you would expect a FLOWMASTER exhaust kit. Its louder than stock and completely DIY no need to pay installation. Some of the reviews make you wonder? Of course its loud, thats the point! Either way all of the problems I noticed in some of the other reviews are fitment issues. This exhaust does require some fitment, but nothing complicated and a hack saw won't fix. I removed approx. 1 1/4 from the Y to Inlet tube which allowed the box itself to slide between supports and prevent any rattling or knocking and allows full clearance at the back when installing final piece with chrome tip attached. I also removed the rear sway to make the installation easier, a quick five minutes removing this can prevent 30 minutes of trying to squeeze the pipe in place.

### ⭐⭐⭐⭐ This is not as hard to install as people say it is.
*by L***Y on September 4, 2018*

I installed this on my 2018 JK 2 door auto. On a floor, with no jackstands, outside, by myself. It took me about 4 hours, taking my sweet time and only dropped the muffler on my face once. some points of interest that may help others: 1) The old system is annoying to remove, even without any rust or dirt under my relatively new Jeep. 2) People complain about the instructions being vague, but it's exhaust. It's not complicated. 2.5) The only thing lacking in the instructions is that it doesn't tell you to remove the skidplate assembly to remove the factory piping. 3) The instructions say to cut 20.5 inches off the long pipe for a 2 door, and that's exactly where I ended up 4) The pipe that goes over the axle is a very tight fit between the sway bar and the body, but IT DOES FIT if you have it rotated to the correct angle. 5) If you have a lift with spacers to lower the rear sway bar brackets, fitment will be a lot more forgiving. 6) If you have exhaust spacers you will need to cut more from the pipe in front of the muffler. There is more than enough allowance for that. Overall this wasn't any more difficult to install than any other pre-made exhaust system I've ever installed. Sound was ricey at first, lot of hummy bass to the noise. I was worried I'd made a mistake. But in less than 30 miles it blew out the cobwebs and cleared it's throat and has settled into a much throatier better sounding exhaust. Slight drone at 1800 rpms under light throttle but I was doing it on purpose to see if it would; normal driving has mostly no drone. It's by no means a v8, but it's a very aggressive sound that is appropriate for this small of an engine in a Jeep. It took away some of the sluggishness of driving it too, which should translate into more mpg's. 4 stars instead of 5 for making me pay for 20 inches of stainless pipe that i had to cut off and for having an annoyingly tight fit over the sway bar instead of including a small drop spacer which would have made this a super easy install instead of an average annoying one.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ma/products/8357931-flowmaster-817674-american-thunder-cat-back-exhaust-system](https://www.desertcart.ma/products/8357931-flowmaster-817674-american-thunder-cat-back-exhaust-system)

---

*Product available on Desertcart Morocco*
*Store origin: MA*
*Last updated: 2026-04-25*