---
product_id: 9099837
title: "MagnaFlow Performance Exhaust Muffler 11386 | Deep Signature Sound, 4x9x14\" Oval, Stainless Steel, 2.5\"/2.5\" Inlet/Outlet, Dual/Dual"
brand: "magnaflow exhaust products"
price: "$442.86"
currency: USD
in_stock: true
reviews_count: 13
category: "Magna Flow Exhaust Products"
url: https://www.desertcart.us/products/9099837-magnaflow-performance-exhaust-muffler-11386-deep-signature-sound-4x9x14-oval
store_origin: US
region: United States of America
---

# Dyno-proven power & flow boost Signature deep, smooth MagnaFlow sound Universal 2.5" dual inlet/outlet fit MagnaFlow Performance Exhaust Muffler 11386 | Deep Signature Sound, 4x9x14" Oval, Stainless Steel, 2.5"/2.5" Inlet/Outlet, Dual/Dual

**Brand:** magnaflow exhaust products
**Price:** $442.86
**Availability:** ✅ In Stock

## Summary

> 🚗 Unleash the power and sound your ride deserves!

## Quick Answers

- **What is this?** MagnaFlow Performance Exhaust Muffler 11386 | Deep Signature Sound, 4x9x14" Oval, Stainless Steel, 2.5"/2.5" Inlet/Outlet, Dual/Dual by magnaflow exhaust products
- **How much does it cost?** $442.86 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/9099837-magnaflow-performance-exhaust-muffler-11386-deep-signature-sound-4x9x14-oval)

## Best For

- magnaflow exhaust products enthusiasts

## Why This Product

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

## Key Features

- • **Iconic MagnaFlow Sound:** Delivers a deep, resonating exhaust tone that commands attention without overwhelming noise.
- • **Limited Lifetime Warranty:** Confidence-backed ownership with MagnaFlow’s industry-leading construction warranty.
- • **Durable Stainless Steel Build:** Crafted in the USA with premium materials for long-lasting, corrosion-resistant performance.
- • **Dyno-Tested Performance Gains:** Optimized internal design improves exhaust flow, boosting engine power and efficiency.
- • **Universal Fitment, Precision Engineered:** Fits most vehicles with 2.5" dual inlet/outlet connections for seamless upgrades.

## Overview

The MagnaFlow Performance Exhaust Muffler 11386 is a 4" x 9" oval, stainless steel muffler featuring dual 2.5" inlet/outlet connections for universal fitment. Engineered with a straight-through perforated core and two-stage acoustic packing, it delivers MagnaFlow’s signature deep, smooth exhaust tone while enhancing engine performance through improved exhaust flow. Proudly made in the USA and backed by a limited lifetime construction warranty, this muffler is a top choice for car and truck enthusiasts seeking both power and refined sound.

## Description

Buy MagnaFlow Performance Exhaust Muffler 11386 | Deep Signature Sound, 4x9x14" Oval, Stainless Steel, 2.5"/2.5" Inlet/Outlet, Dual/Dual: Mufflers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Great muffler - Works and fits correctly and sounds good
Review: Exceded my expectations - Put on my 98 GMC seirra Z71 shortbed, regular cab, with brand new crate 5.7 vortec. Had true duels with no cats and two seperate flow master super 44s. Replaced the two super 44s with single Dual inlet, Dual outlet Magnaflow X-PIPE muffler. I was everything I was hoping for and then some. Its a bit quiter now but the overall sound is much better. More deep, smooth almost high performance v8 sound. I swear the truck has a noticeable amount of more power and seems to run smoother probably because the X pipe is evening out the flow, where b4 they never met. If your looking for a more deep distinguished high-performance sound as opposed to just loud, then this is the way to go. Fantastic Mufflers.

## Features

- UNIVERSAL FITMENT – This is a universal muffler. The body of the muffler measures 9” wide, 4” tall, and 14” long, with two 2.5” ID connections on either end. Measure for fitment before ordering. Professional installation is highly recommended.
- SIGNATURE MAGNAFLOW SOUND - The 4" x 9" oval body is engineered to deliver the deep, resonating sound that MagnaFlow mufflers are famous for.
- DYNO-PROVEN PERFORMANCE - Extensive dyno testing is used to ensure that this 4" x 9" Oval muffler increases engine power and performance by improving the flow dynamics and evacuation of exhaust gases.
- OPTIMAL ARCHITECTURE & CONSTRUCTION - The internal architecture of this muffler features a straight-through perforated core with two-stage acoustic packing which maintains the velocity of exhaust flow while generating a smooth, deep exhaust tone. Proudly made in the USA.
- LIMITED LIFETIME CONSTRUCTION WARRANTY - Performance that lasts. Enjoy worry-free ownership knowing that you're backed by MagnaFlow’s limited lifetime construction warranty.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000XQJZ34 |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #93,829 in Automotive ( See Top 100 in Automotive ) #18 in Automotive Performance Exhaust Mufflers #70 in Automotive Replacement Exhaust Mufflers |
| Brand | MagnaFlow Exhaust Products |
| Brand Name | MagnaFlow Exhaust Products |
| Compatible with Vehicle Type | Car, Truck |
| Configuration | Dual/Dual |
| Customer Reviews | 4.6 out of 5 stars 504 Reviews |
| Global Trade Identification Number | 00841380000729 |
| Included Components | MagnaFlow 11386 Performance Exhaust Muffler |
| Inlet Connection Size | 2.5 inches |
| Item Dimensions | 20 x 9 x 4 inches |
| Item Type Name | Automotive Performance Exhaust Muffler |
| Item Weight | 11 pounds |
| Item dimensions L x W x H | 20 x 9 x 4 inches |
| Manufacturer | MagnaFlow Exhaust Products |
| Manufacturer Part Number | 11386 |
| Manufacturer Warranty Description | Limited Lifetime Construction Warranty |
| Material | Stainless Steel |
| Material Type | Stainless Steel |
| Model Number | 11386 |
| Number of Items | 1 |
| OEM Equivalent Part Number | 11386 |
| Outlet Connection Size | 2.5 inches |
| Shape | Oval |
| UPC | 841380000729 |
| Unit Count | 1 Count |
| Vehicle Service Type | Car, Truck |

## Product Details

- **Brand:** MagnaFlow Exhaust Products
- **Item Weight:** 11 pounds
- **Item dimensions L x W x H:** 21.13 x 4.5 x 4.5 inches
- **Material:** Stainless Steel
- **Vehicle Service Type:** Car, Truck

## Images

![MagnaFlow Performance Exhaust Muffler 11386 | Deep Signature Sound, 4x9x14" Oval, Stainless Steel, 2.5"/2.5" Inlet/Outlet, Dual/Dual - Image 1](https://m.media-amazon.com/images/I/61DhSQsoAmL.jpg)

## Available Options

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

## Questions & Answers

**Q: Does the actual product shipped by Amazon have 2 1/2 inch or 2 1/4 inch inlet/outlet?**
A: This is a resonated x-pipe with 2.25 inlets and outlets

**Q: Is this a resonated x pipe??**
A: It is a resonated x pipe. Like you find it in the street version of the magnaflow cat back exhaust system.

**Q: What is the measurements of this muffler?**
A: ONFIGURATION - DUAL/DUAL
LENGTH - 14 IN
OVERALL LGTH - 20 IN
IN/OUT DIA - 2.5/2.5 IN

**Q: Can this fit on a 2019 v6 rs camaro ?**
A: Hello,

MagnaFlow Part # 11386 has a universal configuration, which means that cutting, fabrication and/or welding may be required for your vehicle. MagnaFlow recommends professional installation.

Thank you,

MagnaFlow Exhaust Products

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great muffler
*by J***H on May 8, 2026*

Works and fits correctly and sounds good

### ⭐⭐⭐⭐⭐ Exceded my expectations
*by W***S on December 29, 2024*

Put on my 98 GMC seirra Z71 shortbed, regular cab, with brand new crate 5.7 vortec. Had true duels with no cats and two seperate flow master super 44s. Replaced the two super 44s with single Dual inlet, Dual outlet Magnaflow X-PIPE muffler. I was everything I was hoping for and then some. Its a bit quiter now but the overall sound is much better. More deep, smooth almost high performance v8 sound. I swear the truck has a noticeable amount of more power and seems to run smoother probably because the X pipe is evening out the flow, where b4 they never met. If your looking for a more deep distinguished high-performance sound as opposed to just loud, then this is the way to go. Fantastic Mufflers.

### ⭐⭐⭐⭐⭐ Awesome!!
*by H***R on June 24, 2024*

Chopped out X pipe and replaced with this. Drone , rasp, and popping gone. Quieted down substantially when added to the borla axle back touring . VERY DEEP and RICH at part throttle and idle. Screams like an LS should when ya crack it. Wish audio was better on video..... Sounds amazing! 2012 Camaro SS . Heads, III BTR, LS3 valvetrain, long tubes cat-less, DOD delete, Circle D 3200, 373 gear..... smile extra large

## Frequently Bought Together

- MagnaFlow X-PIPE Performance Muffler 11386 | 2.5" Inlet/Outlet
- Upower Pack of 2 Exhaust Tip 2.5 inch Inlet 4 inch Outlet 9" Long 304 Stainless Steel 2.5" to 4" Diesel Exhaust Tailpipe Tip Double Wall Slant Cut
- Boost Monkey 2X 2-Bolt 2.5" I.D Reinforced High Temperature Exhaust Gasket Turbo

---

## 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.us/products/9099837-magnaflow-performance-exhaust-muffler-11386-deep-signature-sound-4x9x14-oval](https://www.desertcart.us/products/9099837-magnaflow-performance-exhaust-muffler-11386-deep-signature-sound-4x9x14-oval)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-09-01*