aFe Magnum FLOW Pro DRY S drop-in OE replacement air filters for 2012-2021 BMW M-cars including the M2 Competition, M3, M4, M5 and M6 (S55 3.0L and S63 4.4L). Sold as a matched pair of two filters. Three-layer oil-free synthetic media that needs no re-oiling, washable and reusable, in a 100% polyurethane frame with an integrated bump seal. Outflows the stock paper filters for added horsepower and torque.
Specifications
| Type | Drop-in OE replacement air filter |
| Media | Three-layer oil-free synthetic (Pro DRY S) |
| Frame | 100% polyurethane with integrated bump seal |
| Service | Washable and reusable; no re-oiling |
| Quantity | Pair (2 filters) |
| Fitment | Direct fit in factory air box |
| Part Number | 31-10238 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2019-2021 | BMW | M2 | Competition |
| 2015-2018 | BMW | M3 | Base |
| 2015-2020 | BMW | M4 | Base |
| 2019-2020 | BMW | M4 | CS |
| 2016 | BMW | M4 | GTS |
| 2013-2016 | BMW | M5 | Base |
| 2012-2018 | BMW | M6 | Base |
| 2014-2019 | BMW | M6 Gran Coupe | Base |
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
