# MagnaFlow 21-177 OEM Grade Direct Fit Catalytic Converter (2.25" ID/2.25" OD) for 2010-2016 Buick Lacrosse 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: 21-177
-   Product type: OEM Grade Direct Fit Catalytic Converter (2.25" ID/2.25" OD)
-   Designed for compatible vehicle applications listed on this page

### Vehicle Fitment

-   2010 Buick Lacrosse, Note: Cx; 2.4L; 2.25"; 2.25"
-   2011 Buick Lacrosse, Note: Cx, Cxl; 2.4L; 2.25"; 2.25"
-   2012 Buick Lacrosse, Note: Base, Convenience, Leather, Premium; 2.4L; 2.25"; 2.25"
-   2013 Buick Lacrosse, Note: Base, Leather; 2.4L; 2.25"; 2.25"
-   2014 Buick Lacrosse, Note: Base, Leather; 2.4L; 2.25"; 2.25"
-   2015 Buick Lacrosse, Note: Base, Leather; 2.4L; 2.25"; 2.25"
-   2016 Buick Lacrosse, Note: Base, Leather; 2.4L; 2.25"; 2.25"
-   2011 Buick Regal, Note: Cxl; 2.4L; 2.25"; 2.25"

### 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 21-177.

**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 (2.25" ID/2.25" OD) for Buick Lacrosse
-   21-177 fitment
-   MagnaFlow OEM Grade Direct Fit Catalytic Converter (2.25" ID/2.25" OD)
-   2010 Buick Lacrosse OEM Grade Direct Fit Catalytic Converter (2.25" ID/2.25" OD)

### Vehicle Fitment Table

Year

Make

Model

Position

Fitment Precision

Note

2010

Buick

Lacrosse

Cx; 2.4L; 2.25"; 2.25"

2011

Buick

Lacrosse

Cx, Cxl; 2.4L; 2.25"; 2.25"

2012

Buick

Lacrosse

Base, Convenience, Leather, Premium; 2.4L; 2.25"; 2.25"

2013

Buick

Lacrosse

Base, Leather; 2.4L; 2.25"; 2.25"

2014

Buick

Lacrosse

Base, Leather; 2.4L; 2.25"; 2.25"

2015

Buick

Lacrosse

Base, Leather; 2.4L; 2.25"; 2.25"

2016

Buick

Lacrosse

Base, Leather; 2.4L; 2.25"; 2.25"

2011

Buick

Regal

Cxl; 2.4L; 2.25"; 2.25"

2012

Buick

Regal

Base, Premium; 2.4L; 2.25"; 2.25"

2013

Buick

Regal

Base, Premium; 2.4L; 2.25"; 2.25"

2014

Buick

Regal

Base, Premium; 2.4L; 2.25"; 2.25"

2015

Buick

Regal

Base, Premium; 2.4L; 2.25"; 2.25"

2014

Chevrolet

Impala

Eco; 2.4L; 2.25"; 2.25"

2013

Chevrolet

Malibu

Eco; 2.4L; 2.25"; 2.25"

2014

Chevrolet

Malibu

Eco; 2.4L; 2.25"; 2.25"

## Details

- **Price:** 1004.85 CAD
- **Vendor:** MagnaFlow
- **Type:** OEM Grade Direct Fit Catalytic Converter (2.25" ID/2.25" OD)
- **Tags:** 2010 Buick Lacrosse, 2011 Buick Lacrosse, 2011 Buick Regal, 2012 Buick Lacrosse, 2012 Buick Regal, 2013 Buick Lacrosse, 2013 Buick Regal, 2013 Chevrolet Malibu, 2014 Buick Lacrosse, 2014 Buick Regal, 2014 Chevrolet Impala, 2014 Chevrolet Malibu, 2015 Buick Lacrosse, 2015 Buick Regal, 2016 Buick Lacrosse, 21-177, Auto Parts, Automotive, Catalytic Converter, Direct Replacement, Exhaust Performance, Exhaust System, MagnaFlow, Magnaflow-21-177, Muffler, OEM Grade Direct Fit Catalytic Converter (2.25" ID/2.25" OD), Performance Exhaust, Performance Parts, Vehicle Fitment

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1004.85 CAD | In stock |

## Images

- MagnaFlow 21-177 OEM Grade Direct Fit Catalytic Converter (2.25" ID/2.25" OD)

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/magnaflow-buick-lacrosse-catalytic-converter-21-177)
> Updated: 2026-07-16