# MagnaFlow 4551006 California Direct Fit Catalytic Converter (3" ID/3" OD) for 2003-2007 Chevrolet Silverado 2500 Hd and More

### Performance Overview

Magnaflow's California Catalytic Converter is designed to be CARB compliant. The catalytic converter's ribbed body is designed to minimize distortion and expansion of the body to hold the ceramic catalyst in place. magnaflow's Catalytic Converters are made of stainless steel and are backed by their limited lifetime warranty.

### Key Features

-   Brand: MagnaFlow
-   Part number: 4551006
-   Product type: California Direct Fit Catalytic Converter (3" ID/3" OD)
-   Designed for compatible vehicle applications listed on this page

### Vehicle Fitment

-   2003 Chevrolet Silverado 2500 Hd, Note: Base, Ls, Lt, Wt; 6.0L; 3.00"; 3.00"
-   2004 Chevrolet Silverado 2500 Hd, Note: Ls, Lt, Wt; 6.0L; 3.00"; 3.00"
-   2005 Chevrolet Silverado 2500 Hd, Note: Ls, Lt, Wt; 6.0L; 3.00"; 3.00"
-   2006 Chevrolet Silverado 2500 Hd, Note: Ls, Lt, Wt; 6.0L, 8.1L; 3.00"; 3.00"
-   2007 Chevrolet Silverado 2500 Hd, Note: Ls, Lt, Wt; 6.0L, 8.1L; Classic Body; 3.00"; 3.00"
-   2007 Chevrolet Silverado 3500, Note: Ls, Lt, Wt; 6.0L; Classic Body; 3.00"; 3.00"
-   2003 GMC Sierra 2500 Hd, Note: Base, Sle, Slt, Wt; 6.0L; 3.00"; 3.00"
-   2004 GMC Sierra 2500 Hd, Note: Sle, Slt, Wt; 6.0L; 3.00"; 3.00"

### 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 4551006.

**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

-   California Direct Fit Catalytic Converter (3" ID/3" OD) for Chevrolet Silverado 2500 Hd
-   4551006 fitment
-   MagnaFlow California Direct Fit Catalytic Converter (3" ID/3" OD)
-   2003 Chevrolet Silverado 2500 Hd California Direct Fit Catalytic Converter (3" ID/3" OD)

### Vehicle Fitment Table

Year

Make

Model

Position

Fitment Precision

Note

2003

Chevrolet

Silverado 2500 Hd

Base, Ls, Lt, Wt; 6.0L; 3.00"; 3.00"

2004

Chevrolet

Silverado 2500 Hd

Ls, Lt, Wt; 6.0L; 3.00"; 3.00"

2005

Chevrolet

Silverado 2500 Hd

Ls, Lt, Wt; 6.0L; 3.00"; 3.00"

2006

Chevrolet

Silverado 2500 Hd

Ls, Lt, Wt; 6.0L, 8.1L; 3.00"; 3.00"

2007

Chevrolet

Silverado 2500 Hd

Ls, Lt, Wt; 6.0L, 8.1L; Classic Body; 3.00"; 3.00"

2007

Chevrolet

Silverado 3500

Ls, Lt, Wt; 6.0L; Classic Body; 3.00"; 3.00"

2003

GMC

Sierra 2500 Hd

Base, Sle, Slt, Wt; 6.0L; 3.00"; 3.00"

2004

GMC

Sierra 2500 Hd

Sle, Slt, Wt; 6.0L; 3.00"; 3.00"

2005

GMC

Sierra 2500 Hd

Sle, Slt, Wt; 6.0L; 3.00"; 3.00"

2006

GMC

Sierra 2500 Hd

Sl, Sle, Slt, Wt; 6.0L, 8.1L; 3.00"; 3.00"

2007

GMC

Sierra 2500 Hd

Sl, Sle, Slt, Wt; 6.0L, 8.1L; Classic Body; 3.00"; 3.00"

2007

GMC

Sierra 3500

Sl, Sle, Slt, Wt; 6.0L; Classic Body; 3.00"; 3.00"

## Details

- **Price:** 2279.4 CAD
- **Vendor:** MagnaFlow
- **Type:** California Direct Fit Catalytic Converter (3" ID/3" OD)
- **Tags:** 2003 Chevrolet Silverado 2500 Hd, 2003 GMC Sierra 2500 Hd, 2004 Chevrolet Silverado 2500 Hd, 2004 GMC Sierra 2500 Hd, 2005 Chevrolet Silverado 2500 Hd, 2005 GMC Sierra 2500 Hd, 2006 Chevrolet Silverado 2500 Hd, 2006 GMC Sierra 2500 Hd, 2007 Chevrolet Silverado 2500 Hd, 2007 Chevrolet Silverado 3500, 2007 GMC Sierra 2500 Hd, 2007 GMC Sierra 3500, 4551006, Auto Parts, Automotive, California Direct Fit Catalytic Converter (3" ID/3" OD), Catalytic Converter, Direct Replacement, Exhaust Performance, Exhaust System, MagnaFlow, Magnaflow-4551006, Muffler, Performance Exhaust, Performance Parts, Vehicle Fitment

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2279.40 CAD | In stock |

## Images

- MagnaFlow 4551006 California Direct Fit Catalytic Converter (3" ID/3" OD)

---

> Source: [Standard Auto Part](https://www.standardautopart.com/products/magnaflow-chevrolet-silverado-2500-hd-catalytic-converter-carb-4551006)
> Updated: 2026-07-16