---
product_id: 321262421
title: "Flowmonster 11386-FM 409Ss Oval Case Absorption Muffler"
brand: "flowmaster"
price: "₩238553"
currency: KRW
in_stock: true
category: "Flowmaster"
url: https://www.desertcart.kr/products/321262421-flowmonster-11386-fm-409ss-oval-case-absorption-muffler
store_origin: KR
region: South Korea
---

# 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:** ₩238553
**Availability:** ✅ In Stock

## Summary

> 🔥 Unleash the Monster: Power, Precision, and Sound that Commands Attention!

## Quick Answers

- **What is this?** Flowmonster 11386-FM 409Ss Oval Case Absorption Muffler by flowmaster
- **How much does it cost?** ₩238553 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/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

- • **Optimized Exhaust Flow:** Perforated straight-through tube design boosts exhaust flow for enhanced engine performance.
- • **Reversible Internal Design:** Flexible installation options to perfectly fit your vehicle’s setup and maximize compatibility.
- • **Deeper, Mellow Exhaust Tone:** High-temp sound absorption material delivers a refined, aggressive sound without the harsh racey edge.
- • **Precision MIG-Welded Craftsmanship:** Robust construction ensures reliability and a premium finish that stands out under the hood.
- • **Built to Last with 409 Stainless Steel:** Superior corrosion resistance meets sleek, embossed design for lasting style and durability.

## Overview

The Flowmonster 11386-FM 409Ss Oval Case Absorption Muffler combines durable 409 stainless steel construction 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 reversible installation flexibility, making it an ideal upgrade for enthusiasts seeking enhanced performance and a refined aggressive sound.

## 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.

## 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 | #1,231,805 in Automotive ( See Top 100 in Automotive ) #1,430 in Automotive Replacement Exhaust Mufflers |
| Brand Name | Flowmaster |
| Compatible with Vehicle Type | Car |
| Customer Reviews | 4.8 4.8 out of 5 stars (21) |
| 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 | 11.75 Pounds |
| Manufacturer | Flowmonster Performance Mufflers |
| Manufacturer Part Number | 11386-FM |
| Manufacturer Warranty Description | 30 Days |
| Material Type | Stainless Steel |
| Model Number | 11386-FM |
| UPC | 090127075326 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Flowmaster
- **Item Weight:** 11.75 Pounds
- **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

## 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.kr/products/321262421-flowmonster-11386-fm-409ss-oval-case-absorption-muffler](https://www.desertcart.kr/products/321262421-flowmonster-11386-fm-409ss-oval-case-absorption-muffler)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-07-28*