aFe Performance cold air intake system. A direct-fit upgrade over the restrictive factory intake for increased airflow and throttle response — see the fitment chart below for exact vehicle applications.
| Type | Performance cold air intake system |
| Part Number | 54-31918-B |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2011-2013 | BMW | 135i | Base |
| 2011-2013 | BMW | 335i | Base |
| 2011-2013 | BMW | 335i xDrive | Base |
| 2013-2015 | BMW | X1 | xDrive35i |
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.
