MagnaFlow OEM-Grade direct-fit catalytic converter (21-171) for the 2009-2016 BMW Z4 3.0L L6. Spun-body 409 stainless construction with 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 and hardware. Meets California or Federal/EPA emissions for OBDII registered vehicles.
| Type | Direct-fit catalytic converter |
| Grade | OEM Grade |
| Material | 409 stainless steel (spun body) |
| Hardware | Includes gaskets and hardware |
| OEM Replacement | 18 30 7 647 049, 18 30 7 597 137 |
| Emissions | Meets California or Federal/EPA emissions (OBDII) |
| Part Number | 21-171 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2009-2016 | BMW | Z4 | sDrive35i |
| 2011-2016 | BMW | Z4 | sDrive35is |
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Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
