MagnaFlow OEM-Grade Federal/EPA-compliant direct-fit underbody catalytic converter (21-813) for the 2017-2019 Audi Q7 3.0L V6. Spun-body 409 stainless construction with mandrel-bent tubing and a single laser-fusion weld replicates the OE design for smooth exhaust flow and a leak-resistant seal; installs with no cutting or welding and includes gaskets and hardware. Federal/EPA compliant for OBDII Federally registered vehicles (not for CA).
| Type | Direct-fit catalytic converter (underbody) |
| Grade | OEM Grade |
| Material | 409 stainless steel (spun body) |
| Hardware | Gaskets & hardware included |
| OEM Replacement | 4M0 254 252 RX, 4M0 254 252 AX |
| Position | Underbody |
| Emissions | Federal/EPA compliant (not for CA) |
| Part Number | 21-813 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2017-2019 | Audi | Q7 | Premium |
| 2017-2019 | Audi | Q7 | Premium Plus |
| 2017-2019 | Audi | Q7 | Prestige |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
