The MagnaFlow 444021 is a California Grade CARB compliant direct-fit catalytic converter for the left side of the 4.6L V8, with a clam-shell body, aluminized heat shield, flanged inlet and outlet and a 35.5 inch overall length. It carries CARB EO D-193-171, is New York certified, and provides four sensor ports for pre and post converter O2 sensors. Mandrel-bent 16 gauge 409 stainless tubing and 308 stainless MIG welds replicate OEM flow and geometry, and the single laser fusion weld design reduces the chance of leaks. It works with single or dual exhaust Crown Victoria setups and installs with hand tools, with no cutting or welding.
Specifications
| Type | Direct-fit catalytic converter, California Grade CARB compliant |
| Position | Left |
| Emissions | CARB EO D-193-171; New York certified |
| Engine | 4.6L V8 |
| Body | Clam-shell with aluminized heat shield |
| Inlet / Outlet | Flanged |
| Overall Length | 35.5 in |
| O2 Ports | 4 (pre and post converter) |
| Material | 16 gauge 409 stainless steel, ceramic substrate |
| Included | 1 flange gasket, 1 O2 port plug |
| Quantity | 1 |
| Part Number | 444021 |
| Warranty | 5 years/50,000 miles construction and 5 years/50,000 miles emissions (limited) |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1995-2002 | Ford | Crown Victoria | Base |
| 2002 | Ford | Crown Victoria | LWB |
| 1995-2002 | Ford | Crown Victoria | LX |
| 1995-2002 | Ford | Crown Victoria | Police Interceptor |
| 1995-2002 | Ford | Crown Victoria | S |
| 1995-2002 | Mercury | Grand Marquis | GS |
| 1995-2002 | Mercury | Grand Marquis | LS |
Shipping
- Items stocked at OneFastShop and ordered before 3 PM ET typically ship the same business day. Items stocked with our distributors usually ship within 1 to 3 business days.
- 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 cannot 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
