The MagnaFlow 21-473 is an OEM-grade, Federal/EPA-compliant direct-fit catalytic converter for the driver side (Bank 2) of the 3.7L V6. It is built from 16-gauge 409 stainless steel with mandrel-bent tubing and a spun body that replicates factory geometry, while a single laser fusion weld minimizes leak points and the compact, low-mass design improves thermal efficiency. OE-style 410 stainless barbed hangers and 308 stainless MIG welds add durability, and the gaskets and hardware needed for a bolt-in install are included, so no cutting or welding is required. It is emissions-legal on Federal/EPA vehicles in 49 states and is not legal for sale or use in California.
| Type | Direct-Fit Catalytic Converter (OEM Grade) |
| Position | Driver side (Bank 2) |
| Material | 16-gauge 409 stainless steel |
| Emissions | Federal/EPA compliant (49-state, not legal in California) |
| Quantity | 1 |
| Part Number | 21-473 |
| OEM Replacement | FR3Z-5E213-D, FR3Z-5E213-A |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2017 | Ford | Mustang | V6 |
