This MagnaFlow OEM Grade direct-fit catalytic converter is Federal/EPA compliant for OBDII vehicles and is not legal for use in California, Colorado, or New York. It uses a spun body with mandrel bent tubing, a 3 in inlet, and a 2.5 in outlet, built with 409 stainless steel tubing and 308 stainless MIG welds. It bolts in with no cutting or welding, with a Torca clamp included.
Specifications
| Type | Direct-fit catalytic converter (MagnaFlow OEM Grade) |
| Emissions | Federal/EPA; not legal in CA, CO, NY |
| Engine | 2.0L I4 |
| Body | Spun |
| Inlet / Outlet | 3 in ID / 2.5 in ID |
| Overall Length | 66.625 in |
| Includes | (1) Torca clamp |
| OEM Replacement | 5Q0 254 501 DX |
| Part Number | 21-580 |
| Warranty | Limited 25,000 mile emissions / 5 year construction |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2016 | Audi | A3 Quattro | Premium |
| 2015-2016 | Audi | A3 Quattro | Premium Plus |
| 2015-2016 | Audi | A3 Quattro | Prestige |
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
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