# MagnaFlow 21-807 OEM Grade Direct Fit Catalytic Converter for 2017-2021 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: 21-807
-   Product type: OEM Grade Direct Fit Catalytic Converter
-   Designed for compatible vehicle applications listed on this page

### Vehicle Fitment

-   2018 Buick Lacrosse, Note: Base, Essence, Preferred, Premium; 2.5L
-   2019 Buick Lacrosse, Note: Base, Essence, Preferred, Premium; 2.5L
-   2017 GMC Acadia, Note: Sl, Sle, Slt; 2.5L
-   2018 GMC Acadia, Note: Sl, Sle, Slt; 2.5L
-   2019 GMC Acadia, Note: Sl, Sle, Slt; 2.5L
-   2020 GMC Acadia, Note: Sl, Sle; 2.5L
-   2021 GMC Acadia, Note: Sl, Sle; 2.5L

### 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 21-807.

**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 Buick Lacrosse
-   21-807 fitment
-   MagnaFlow OEM Grade Direct Fit Catalytic Converter
-   2017 Buick Lacrosse OEM Grade Direct Fit Catalytic Converter

### Vehicle Fitment Table

Year

Make

Model

Position

Fitment Precision

Note

2018

Buick

Lacrosse

Base, Essence, Preferred, Premium; 2.5L

2019

Buick

Lacrosse

Base, Essence, Preferred, Premium; 2.5L

2017

GMC

Acadia

Sl, Sle, Slt; 2.5L

2018

GMC

Acadia

Sl, Sle, Slt; 2.5L

2019

GMC

Acadia

Sl, Sle, Slt; 2.5L

2020

GMC

Acadia

Sl, Sle; 2.5L

2021

GMC

Acadia

Sl, Sle; 2.5L

## Details

- **Price:** 1130.9 CAD
- **Vendor:** MagnaFlow
- **Type:** OEM Grade Direct Fit Catalytic Converter
- **Tags:** 2017 GMC Acadia, 2018 Buick Lacrosse, 2018 GMC Acadia, 2019 Buick Lacrosse, 2019 GMC Acadia, 2020 GMC Acadia, 2021 GMC Acadia, 21-807, Auto Parts, Automotive, Catalytic Converter, Direct Replacement, Exhaust Performance, Exhaust System, MagnaFlow, Magnaflow-21-807, Muffler, OEM Grade Direct Fit Catalytic Converter, Performance Exhaust, Performance Parts, Vehicle Fitment

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1130.90 CAD | In stock |

## Images

- MagnaFlow 21-807 OEM Grade Direct Fit Catalytic Converter

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> Source: [Standard Auto Part](www.standardautopart.com/products/magnaflow-buick-lacrosse-catalytic-converter-21-807)
> Updated: 2026-06-13