---
product_id: 7602597
title: "MagnaFlow Performance Exhaust Muffler 12278: 3\"/2.25\" Inlet/Outlet, 5x8x18\" Oval, Stainless Steel, Satin Finish"
brand: "magnaflow exhaust products"
price: "$553"
currency: NZD
in_stock: true
reviews_count: 13
url: https://www.desertcart.nz/products/7602597-magnaflow-performance-exhaust-muffler-12278-3-2-25-inlet-outlet
store_origin: NZ
region: New Zealand
---

# Deep signature MagnaFlow sound 3" inlet / 2.25" outlet precision fit Stainless steel corrosion resistance MagnaFlow Performance Exhaust Muffler 12278: 3"/2.25" Inlet/Outlet, 5x8x18" Oval, Stainless Steel, Satin Finish

**Brand:** magnaflow exhaust products
**Price:** $553
**Availability:** ✅ In Stock

## Summary

> 🎯 Unleash power and prestige with every rev!

## Quick Answers

- **What is this?** MagnaFlow Performance Exhaust Muffler 12278: 3"/2.25" Inlet/Outlet, 5x8x18" Oval, Stainless Steel, Satin Finish by magnaflow exhaust products
- **How much does it cost?** $553 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/7602597-magnaflow-performance-exhaust-muffler-12278-3-2-25-inlet-outlet)

## 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

- • **Worry-Free Warranty:** Backed by a limited lifetime construction warranty—drive confidently, knowing you’re covered.
- • **Iconic MagnaFlow Sound:** Experience the unmistakable deep, resonant tone that turns heads and ignites envy.
- • **Built to Last a Lifetime:** Crafted from corrosion-resistant stainless steel with CNC robotic precision for unmatched durability.
- • **Universal Fit Flexibility:** Designed for versatile installation—customize your exhaust setup with professional precision.
- • **Sleek Satin Finish Upgrade:** Elevate your ride’s style with a premium brushed satin look that commands attention.

## Overview

The MagnaFlow Performance Exhaust Muffler 12278 features a 3" inlet and 2.25" outlet with an oval 5x8x18" design, crafted from corrosion-resistant stainless steel with a brushed satin finish. Engineered for a deep, signature MagnaFlow sound, it offers universal fitment requiring professional installation and is backed by a limited lifetime warranty for enduring performance.

## Description

Fully reversible and featuring a free-flowing, straight-through perforated stainless steel core, stainless mesh wraps our acoustic fiber fill to deliver a smooth, deep tone for your custom exhaust project. MagnaFlow's dedication to engineering and manufacturing the finest exhaust systems makes for a superior sound and driving experience. Constructed of premium materials and carefully designed for the best fitment and performance, you can have confidence in making the right choice for your vehicle.

## Features

- BRUSHED SATIN FINISH - The brushed satin finish of this universal performance muffler will upgrade the appearance of your vehicle's exhaust system thanks to its premium aesthetic.
- DEEP SIGNATURE MAGNAFLOW SOUND - This universal muffler is engineered to produce the deep resonant exhaust tone that MagnaFlow is famous for.
- UNIVERSAL FIT - The universal configuration of this performance muffler means that cutting, fabrication and/or welding may be required. MagnaFlow recommends professional installation.
- STAINLESS STEEL CONSTRUCTION - Highly corrosion resistant, stainless steel construction incorporating CNC precision robotic manufacturing for quality fitment and longevity. Built to be the exhaust that lasts the lifetime of your vehicle.
- 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 |
|---------------|-------|
| Brand | MagnaFlow Exhaust Products |
| Vehicle Service Type | Car, Truck |
| Configuration | Center/Dual |
| Shape | Oval |
| Inlet Connection Size | 3 Inches |
| Outlet Connection Size | 2.25 Inches |
| UPC | 841380000989 |
| Manufacturer | MagnaFlow Exhaust Products |
| Global Trade Identification Number | 00841380000989 |
| OEM Part Number | 12278 |
| Automotive Fit Type | Vehicle Specific Fit |
| Model | Straight-Through |
| Item Weight | 5 pounds |
| Item model number | 12278 |
| Is Discontinued By Manufacturer | No |
| Exterior | Satin |
| Manufacturer Part Number | 12278 |

## Product Details

- **Brand:** MagnaFlow Exhaust Products
- **Material:** Stainless Steel
- **Vehicle Service Type:** Car, Truck
- **Item Weight:** 5 Pounds
- **Configuration:** Center/Dual

## Images

![MagnaFlow Performance Exhaust Muffler 12278: 3"/2.25" Inlet/Outlet, 5x8x18" Oval, Stainless Steel, Satin Finish - Image 1](https://m.media-amazon.com/images/I/51zplOBd+SL.jpg)
![MagnaFlow Performance Exhaust Muffler 12278: 3"/2.25" Inlet/Outlet, 5x8x18" Oval, Stainless Steel, Satin Finish - Image 2](https://m.media-amazon.com/images/I/71XTolGwexL.jpg)
![MagnaFlow Performance Exhaust Muffler 12278: 3"/2.25" Inlet/Outlet, 5x8x18" Oval, Stainless Steel, Satin Finish - Image 3](https://m.media-amazon.com/images/I/81GdLPSsXUL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    As usual, just the right tone!
  

*by S***F on Reviewed in the United States on March 3, 2020*

Don't get me wrong; I like Flowmaster's products and other chambered-style mufflers. But they just seem a bit too loud for passenger cars. I removed the main resonator and 2 main mufflers on my Lexus GS400, and the drone was just too bad, so I bought this unit and put it in the place of the original front/main resonator. After that, it goes through the 2 secondary resonators and out through straight pipe. The drone now is at a low level, and sounds sweet! Magnaflow's stainless products can be spendy, but as a technician, I've driven many vehicles with their mufflers, and the sound has always been nice. Remember that the length and size of your pipes affects the amount of drone, so you don't need to blame it on the muffler.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    2011 Dodge Ram Big Horn
  

*by A***5 on Reviewed in the United States on November 16, 2012*

I installed this on my Dodge Ram and I love the sound.  The only annoyance with this truck + the magnaflow was when the MDS kicked in on the truck.  I thought this was going to be forever, but after the burn-in period, the sound is almost completely gone.  This particular magnaflow is a direct fit for the dual exhaust Ram 1500.UPDATE: I forgot to update this sooner and it's been a year now...The exhaust has been on my truck now for over 10,000 miles and the sound is amazing.  The truck no longer drones when the MDS kicks in...Somehow, the burn in period helps reduce this.  I have bluetooth in my truck and I've never had anyone complain about cabin noise.  Keep in mind that the Ram's exhaust pipes go all the way out the back, so you will not have as much noise as if you had a turndown pipe, for example.

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Dont get me wrong - Its still there but not nearly as bad as the first day
  

*by F***O on Reviewed in the United States on July 28, 2015*

I bought this for my truck (09 dodge hemi) and its got the right sound - opens the hemi and sounds mean under WOT but in daily driving I can still talk to my kids and wife. It does the job. One thing to note however, despite much research online saying the 18inch muffler wont drone, my findings is that it DOES drone  and was a concern. However after a week, the drone grew quiet despite my expectations for it to get excessively loud. Dont get me wrong - Its still there but not nearly as bad as the first day...go figure. I also tow a 5500 Travel Trailer and the sound levels were acceptable to my liking.

## Frequently Bought Together

- MagnaFlow Performance Exhaust Muffler 12278: 3"/2.25" Inlet/Outlet, 5x8x18" Oval, Stainless Steel, Satin Finish
- Universal ID 2.5 Inch to OD 3 Inch Exhaust Adapter, Stainless Steel Exhaust Coupler(2 1/2" ID to 3" OD), Pipe Adapter Whole Length 3.6 Inch
- EVIL ENERGY 3.0 Inch Exhaust Clamp,Butt Joint Band Clamp Sleeve Coupler Stainless Steel for Pipes,Mufflers,Catalytic Converters 2PCs

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-14*