---
product_id: 321262421
title: "Flowmonster 11386-FM 409Ss Oval Case Absorption Muffler"
brand: "flowmaster"
price: "134040CFA"
currency: XOF
in_stock: true
reviews_count: 4
category: "Flowmaster"
url: https://www.desertcart.sn/products/321262421-flowmonster-11386-fm-409ss-oval-case-absorption-muffler
store_origin: SN
region: Senegal
---

# High-temp sound absorption for mellow tone Perforated high-flow straight-through tube 409 Stainless Steel corrosion resistance Flowmonster 11386-FM 409Ss Oval Case Absorption Muffler

**Brand:** flowmaster
**Price:** 134040CFA
**Availability:** ✅ In Stock

## Summary

> 🔥 Unleash the Monster: Deep tone meets precision flow 🏁

## Quick Answers

- **What is this?** Flowmonster 11386-FM 409Ss Oval Case Absorption Muffler by flowmaster
- **How much does it cost?** 134040CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/321262421-flowmonster-11386-fm-409ss-oval-case-absorption-muffler)

## 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

- • **Flexible Installation:** Reversible internal design means easy fitment in either direction, adapting seamlessly to your vehicle’s setup.
- • **Maximized Exhaust Flow:** Perforated straight-through tube design boosts exhaust flow, enhancing performance without sacrificing sound quality.
- • **Precision Craftsmanship:** Fully MIG-welded construction embossed with the iconic Flowmonster logo guarantees durability and a premium finish.
- • **Deep, Refined Exhaust Tone:** High-temp interior sound absorption material delivers a richer, mellow exhaust note—perfect for enthusiasts who want aggressive without the race-track drone.
- • **Built to Last, Styled to Impress:** Premium 409 stainless steel ensures unbeatable corrosion resistance and a sleek, polished look that stands out under your vehicle.

## Overview

The Flowmonster 11386-FM 409Ss Oval Case Absorption Muffler combines rugged 409 stainless steel durability with a high-temp sound absorption interior and a perforated straight-through tube design. This muffler delivers a deeper, mellow exhaust tone with improved flow and flexible reversible installation, making it the perfect upgrade for car enthusiasts seeking a refined yet aggressive sound without the harshness of chambered mufflers.

## Description

Unleash your Monster with Flowmonster 409 Stainless Steel performance mufflers! The Flowmonster series of absorption style mufflers deliver a moderate tone for the enthusiast looking for a deeper, more aggressive exhaust note than most OE (Original Equipment) mufflers, unlike the racey exhaust note associated with "chambered" style mufflers. Interior construction features 3.50 inch "straight-through" perforated 409 stainless steel tube surrounded by high-temperature sound absorption packing material which helps to deliver a deeper, mellower exhaust note. The internal design is reversible allowing the flexability to be installed in either direction to best accommodate fitment with the intended vehicle. The fully MIG-welded 409 Stainless Steel material is embossed with the "FlowMonster" logo on the case.

Review: Basically a magnaflow - Sounds good and good price
Review: Exactly what I was looking for - I installed this yesterday and it did exactly what I was hoping it would do. I installed it on a modified 2010 Camaro SS right after the transmission with the hopes of it quitting it down just a couple notches. Still sounds great but cold starts are more mild (maybe my neighbors won't be as angry at me in the mornings lol) and eliminated some drone too. Shipped fast also! Thanks

## Features

- 409 Stainless Steel construction for superior corrosion resistance and good looks
- Interior construction features high-temp interior sound absorption material delivering a deeper, mellow exhaust tone
- Perforated High-Flow straight-through tube design for increased exhaust flow
- Moderate increase in interior tone over most OE mufflers
- Internal Design is reversible allowing flexability to be installed in either direction

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08B7HKN84 |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #208,521 in Automotive ( See Top 100 in Automotive ) #169 in Automotive Replacement Exhaust Mufflers |
| Brand | Flowmaster |
| Brand Name | Flowmaster |
| Compatible with Vehicle Type | Car |
| Customer Reviews | 4.8 out of 5 stars 20 Reviews |
| Included Components | Flowmonster 409Ss, Muffler 14X9X4X20 |
| Item Dimensions | 20.8 x 9.4 x 4.3 inches |
| Item Type Name | Flowmonster 409Ss, Muffler 14X9X4X20 |
| Item Weight | 11.8 Pounds |
| Item dimensions L x W x H | 20.8 x 9.4 x 4.3 inches |
| Manufacturer | Flowmonster Performance Mufflers |
| Manufacturer Part Number | 11386-FM |
| Manufacturer Warranty Description | 30 Days |
| Material | Stainless Steel |
| Material Type | Stainless Steel |
| Model Number | 11386-FM |
| UPC | 090127075326 |
| Vehicle Service Type | Car |

## Product Details

- **Brand:** Flowmaster
- **Item Weight:** 0.1 Kilograms
- **Item dimensions L x W x H:** 20.8 x 9.4 x 4.3 inches
- **Material:** Stainless Steel
- **Vehicle Service Type:** Car

## Images

![Flowmonster 11386-FM 409Ss Oval Case Absorption Muffler - Image 1](https://m.media-amazon.com/images/I/61EVD2ucS4L.jpg)
![Flowmonster 11386-FM 409Ss Oval Case Absorption Muffler - Image 2](https://m.media-amazon.com/images/I/71MP+OxMadL.jpg)
![Flowmonster 11386-FM 409Ss Oval Case Absorption Muffler - Image 3](https://m.media-amazon.com/images/I/71VOM0Nk4-L.jpg)
![Flowmonster 11386-FM 409Ss Oval Case Absorption Muffler - Image 4](https://m.media-amazon.com/images/I/71wAAI5Vr3L.jpg)
![Flowmonster 11386-FM 409Ss Oval Case Absorption Muffler - Image 5](https://m.media-amazon.com/images/I/61SubIhIiLL.jpg)

## Questions & Answers

**Q: What is the input and output pipe dimensions?**
A: 2.5 inch inner diameter in and out

## Customer Reviews

### ⭐⭐⭐⭐⭐ Basically a magnaflow
*by D***M on September 18, 2025*

Sounds good and good price

### ⭐⭐⭐⭐⭐ Exactly what I was looking for
*by D***Z on December 29, 2024*

I installed this yesterday and it did exactly what I was hoping it would do. I installed it on a modified 2010 Camaro SS right after the transmission with the hopes of it quitting it down just a couple notches. Still sounds great but cold starts are more mild (maybe my neighbors won't be as angry at me in the mornings lol) and eliminated some drone too. Shipped fast also! Thanks

### ⭐⭐⭐⭐⭐ Mellowed out my stock system
*by L***Y on March 8, 2024*

The stock system on my car was just a bit louder than I liked when the muffler valves were open. Replacing the stock midpipe's X + bullet resonators with a stamped X followed by this resonated X filtered out a bit more of the high frequency sound and reduced the overall volume, and at an excellent price. 9 months in and it doesn't seem to have lost any of its effectiveness.

## Frequently Bought Together

- Flowmonster 11386-FM 409Ss Oval Case Absorption Muffler
- HAOXAOON 2 Pcs Heavy Duty Exhaust Hanger Rod -Universal Use Exhaust Bracket Hanger - 3/8" Rod 10" Long
- EVIL ENERGY 2.5 Inch Exhaust Clamp,2 1/2" Butt Joint Band Clamp Sleeve Coupler Stainless Steel for Pipes,Mufflers,Catalytic Converters 1PCS

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**Shop now:** [https://www.desertcart.sn/products/321262421-flowmonster-11386-fm-409ss-oval-case-absorption-muffler](https://www.desertcart.sn/products/321262421-flowmonster-11386-fm-409ss-oval-case-absorption-muffler)

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-05-28*