# MagnaFlow 21-121 OEM Grade Direct Fit Catalytic Converter for 2011-2022 Infiniti Qx56 and More

### Performance Overview

The Magnaflow OEM Grade Catalytic Converters are the perfect replacement for your stock converter. They are crafted from high-quality stainless or aluminized steel for maximum durability. They are seam-welded for unbreakable bonds with no risk of vibrations. The catalytic converters are available with a lap inserted in the point where the neck meets the catalytic converter body. The neck is carefully formed to be sure that it doesn't reach the body where it can cause trouble to the exhaust flow. As an additional safety feature, the Catalytic Converter has a heavy duty heat shield to protect it against extreme heat and give additional stability.

### Key Features

-   Brand: MagnaFlow
-   Part number: 21-121
-   Product type: OEM Grade Direct Fit Catalytic Converter
-   Designed for compatible vehicle applications listed on this page

### Vehicle Fitment

-   2011 Infiniti Qx56, Note: Base; 5.6L
-   2012 Infiniti Qx56, Note: Base; 5.6L
-   2013 Infiniti Qx56, Note: Base; 5.6L
-   2014 Infiniti Qx80, Note: Base; 5.6L
-   2015 Infiniti Qx80, Note: Base; 5.6L
-   2016 Infiniti Qx80, Note: Base, Limited; 5.6L
-   2017 Infiniti Qx80, Note: Base, Limited; 5.6L
-   2018 Infiniti Qx80, Note: Base, Limited; 5.6L

### FAQ

**Will this fit my vehicle?**  
Please verify your year, make, model, position, and any fitment notes using the compatibility list above before purchase.

**What part number is this?**  
The listed part number is 21-121.

**Is this product designed for direct replacement?**  
Yes. This product is intended to match compatible vehicle applications listed in the fitment section.

**Should I confirm fitment before ordering?**  
Yes. Always compare your original part, position, and vehicle details with the fitment chart before ordering.

### Common Searches

-   OEM Grade Direct Fit Catalytic Converter for Infiniti Qx56
-   21-121 fitment
-   MagnaFlow OEM Grade Direct Fit Catalytic Converter
-   2011 Infiniti Qx56 OEM Grade Direct Fit Catalytic Converter

### Vehicle Fitment Table

Year

Make

Model

Position

Fitment Precision

Note

2011

Infiniti

Qx56

Base; 5.6L

2012

Infiniti

Qx56

Base; 5.6L

2013

Infiniti

Qx56

Base; 5.6L

2014

Infiniti

Qx80

Base; 5.6L

2015

Infiniti

Qx80

Base; 5.6L

2016

Infiniti

Qx80

Base, Limited; 5.6L

2017

Infiniti

Qx80

Base, Limited; 5.6L

2018

Infiniti

Qx80

Base, Limited; 5.6L

2019

Infiniti

Qx80

Limited, Luxe; 5.6L

2020

Infiniti

Qx80

Limited, Luxe; 5.6L

2021

Infiniti

Qx80

Luxe, Premium Select, Sensory; 5.6L

2017

Nissan

Armada

Platinum, Sl, Sv; 5.6L

2018

Nissan

Armada

Platinum, Platinum Reserve, Sl, Sv; 5.6L

2019

Nissan

Armada

Platinum, Platinum Reserve, Sl, Sv; 5.6L

2020

Nissan

Armada

Platinum, Platinum Reserve, Sl, Sv; 5.6L

2021

Nissan

Armada

Midnight Edition, Platinum, S, Sl, Sv; 5.6L

2022

Nissan

Armada

Midnight Edition, Platinum, S, Sl, Sv; 5.6L

2017

Nissan

Titan

Pro-4X, Platinum Reserve, S, Sl, Sv; 5.6L

2018

Nissan

Titan

Pro-4X, Platinum Reserve, S, Sl, Sv; 5.6L

2019

Nissan

Titan

Pro-4X, Platinum Reserve, S, Sl, Sv; 5.6L

## Details

- **Price:** 681.82 CAD
- **Vendor:** MagnaFlow
- **Type:** OEM Grade Direct Fit Catalytic Converter
- **Tags:** 2011 Infiniti Qx56, 2012 Infiniti Qx56, 2013 Infiniti Qx56, 2014 Infiniti Qx80, 2015 Infiniti Qx80, 2016 Infiniti Qx80, 2017 Infiniti Qx80, 2017 Nissan Armada, 2017 Nissan Titan, 2018 Infiniti Qx80, 2018 Nissan Armada, 2018 Nissan Titan, 2019 Infiniti Qx80, 2019 Nissan Armada, 2019 Nissan Titan, 2020 Infiniti Qx80, 2020 Nissan Armada, 2021 Infiniti Qx80, 2021 Nissan Armada, 2022 Nissan Armada, 21-121, Auto Parts, Automotive, Catalytic Converter, Direct Replacement, Exhaust Performance, Exhaust System, MagnaFlow, Magnaflow-21-121, Muffler, OEM Grade Direct Fit Catalytic Converter, Performance Exhaust, Performance Parts, Vehicle Fitment

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 681.82 CAD | In stock |

## Images

- MagnaFlow 21-121 OEM Grade Direct Fit Catalytic Converter

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> Source: [Standard Auto Part](www.standardautopart.com/products/magnaflow-infiniti-qx56-catalytic-converter-21-121)
> Updated: 2026-06-13