MagnaFlow OEM-Grade Federal/EPA-compliant direct-fit catalytic converter (51991) for the 2001-2004 Nissan Frontier and Xterra 2.4L, front position. Spun-body 409 stainless construction with mandrel-bent tubing and a single laser-fusion weld replicates the OE design for smooth flow and a leak-resistant seal; installs with no cutting or welding, and includes gaskets. Federal/EPA compliant (not for sale in California) for OBDII vehicles; interchanges with OE parts 14002-3S600 and 14002-3S610.
| Type | Direct-fit catalytic converter |
| Grade | OEM Grade |
| Material | 409 stainless steel (spun body) |
| Hardware | Gaskets included |
| Position | Front |
| OEM Replacement | 14002-3S600, 14002-3S610 |
| Emissions | Federal/EPA compliant (not for sale in California) |
| Part Number | 51991 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2003 | Nissan | Frontier | Base |
| 2001-2004 | Nissan | Frontier | XE |
| 2001-2002 | Nissan | Xterra | SE |
| 2001-2004 | Nissan | Xterra | XE |
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