The S58 in your X3M or X4M is the same twin-turbo six that powers the M3 and M4, and it wants air. From the factory it breathes through four paper filter elements built for cost and long service intervals, not for flow.
The Dinan Drop-In Air Filter Set swaps all four for deep-pleated cotton filters that drop straight into the factory airboxes on the BMW F97 X3M and F98 X4M. On Dinan's flow bench each bank moves 1,022 CFM against 862 CFM stock at 28 in. H2O, an 18.6% airflow gain. Dinan measured maximum gains of 7 WHP and 8 lb-ft of torque at 4,750 RPM. For a filter change.
Dinan Drop-In Air Filter Set Performance Without the Paperwork
This is the easiest power you will add to an S58. No tune, no coding, no intake swap. The filters seat in the stock airboxes exactly like the paper elements they replace, and they also fit the Dinan carbon fiber intake if you upgrade later. Multi-layer cotton in deep pleats flows more while still filtering properly, and a steel wire mesh keeps each element from collapsing or denting.
It also stays legal. Dinan rates this set legal for sale and use on emissions-controlled vehicles, because it does not affect emissions and is not covered by emissions regulations. Dinan part number D403-0007. Sold by AutoTecknic, an authorized Dinan dealer.
What's Included
- 4 x Dinan high flow drop-in air filters (two per bank)
Key Features
- Dinan-tested 18.6% more airflow: 1,022 CFM vs 862 CFM stock per bank at 28 in. H2O
- Dinan-measured max gains of 7 WHP and 8 lb-ft at 4,750 RPM
- Deep-pleated multi-layer cotton media
- Steel wire mesh for strength and dent resistance
- Drops into the factory airboxes, also fits Dinan intake D760-0054
- No tune or coding required
- Legal for use on emissions-controlled vehicles
Vehicle Fitment
Fits the S58-powered BMW M SAVs below:
- BMW X3M / F97 (2020-2025): X3M, X3M Competition
- BMW X4M / F98 (2020-2025): X4M, X4M Competition
Installation Notes
If you can change a cabin filter, you can do this. Expect a short job with basic hand tools and a cool engine.
- Remove the engine cover and open both airbox lids.
- Lift out the four factory paper filter elements.
- Wipe any debris out of the airboxes.
- Drop in the four Dinan filters, making sure each one seats evenly around its edge.
- Close and latch the airbox lids and refit the engine cover.
