MagnaFlow's OEM Grade converter replaces the rear underbody converter as a bolt-in direct-fit unit, so no cutting or welding is required. The spun body is built from 16 gauge 409 stainless steel tubing with 308 stainless steel MIG welds over a ceramic substrate, measuring 19.25 in overall with a flange inlet, a pipe connection outlet, and one midbed oxygen sensor port. Inlet mounting hardware is included so corroded factory fasteners can be left behind. This converter is built to Federal EPA standards and is not legal for sale or installation in California, Colorado, or New York.
Specifications
| Type | OEM Grade direct-fit catalytic converter |
| Position | Rear (underbody, secondary) |
| Material | 16 gauge 409 stainless steel tubing, 308 stainless steel MIG welds |
| Body | Spun stainless |
| Substrate | Ceramic |
| Overall Length | 19.25 in |
| Inlet / Outlet | Flange / pipe connection |
| Oxygen Sensor Ports | 1 (midbed) |
| Emissions | Federal EPA compliant (49-state). Not CARB certified; not legal for sale or installation in California, Colorado, or New York |
| Included Hardware | Inlet mounting hardware |
| Application Note | Gasoline models. MagnaFlow lists the full hybrid (FHEV) Fusion, Milan, and MKZ application under part number 51785 |
| Quantity | 1 |
| OEM Replacement | AE5Z-5E212-C, AE5Z-5E212-N |
| Part Number | 51288 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2010-2012 | Ford | Fusion | Hybrid |
| 2010-2012 | Ford | Fusion | S |
| 2010-2012 | Ford | Fusion | SE |
| 2010-2012 | Ford | Fusion | SEL |
| 2010-2011 | Mercury | Milan | Base |
| 2010-2011 | Mercury | Milan | Hybrid |
| 2010-2011 | Mercury | Milan | Premier |
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
