MagnaFlow OEM-grade Federal/EPA-compliant direct-fit catalytic converter (21-577) for the 2005-2014 Dodge Challenger, Charger, Magnum and Chrysler 300 SRT8 6.4L V8. Spun-body mandrel-bent 409 stainless tubing with a single laser-fusion weld replicates the OE design for smooth flow and a leak-resistant seal; it bolts in with no cutting or welding, and the necessary hardware is included. Meets Federal/EPA emissions standards for OBDII Federally registered vehicles.
Specifications
| Type | Direct-fit catalytic converter |
| Grade | OEM Grade |
| Material | 409 stainless steel (spun body) |
| Hardware | Hardware included |
| OEM Replacement | 5039 056AG, 5039 056AA |
| Emissions | Federal/EPA compliant |
| Part Number | 21-577 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2005-2010 | Chrysler | 300 | C SRT8 |
| 2012-2014 | Chrysler | 300 | SRT8 |
| 2013 | Chrysler | 300 | SRT8 Core |
| 2008-2014 | Dodge | Challenger | SRT8 |
| 2006-2010,2012-2014 | Dodge | Charger | SRT8 |
| 2006-2008 | Dodge | Magnum | SRT8 |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
