MST Performance BMW B58 Air Intake Kit – 140i, 240i, 340i & 440i (MST-BW-B5801)
If you want more from your BMW’s B58 engine, upgrading the air intake is one of the most straightforward places to start. This kit from MST Performance replaces the restrictive factory airbox with a free-flowing intake system designed to get cooler, denser air into the turbocharger more efficiently – which in turn helps the engine produce more power and respond more sharply to the throttle.
MST Performance are a well-regarded name in the performance intake market, and this kit is built to a solid standard with quality components throughout. It’s designed specifically for the BMW B58 engine found in the 2016 onwards 140i, 240i, 340i and 440i models, so fitment is precise rather than generic.
What Does This Intake Kit Do?
The standard airbox on these BMWs does a reasonable job, but it limits how much air can flow freely to the turbocharger. By replacing it with this open intake system, air can move more freely and with less restriction. The result is improved throttle response – meaning the engine reacts more quickly when you press the accelerator – along with a more noticeable induction sound under load. On a standard car, dyno testing has shown gains of up to 12-14bhp, though real-world results will vary depending on the vehicle’s condition and any existing modifications.
This kit works well on both standard and already-tuned B58 vehicles, making it a sensible first upgrade or a solid addition to an existing setup.
What’s Included?
- Black powder-coated heat shield – helps keep heat from the engine bay away from the intake
- Black powder-coated inlet pipe
- Red pleated dry air filter – easy to clean and maintain, no oiling required
- Silicone joiner – connects components securely
- Full fitting hardware with step-by-step instructions
Fitment
This kit is designed for BMW models fitted with the B58 turbocharged six-cylinder engine from 2016 onwards, covering the 1 Series 140i, 2 Series 240i, 3 Series 340i and 4 Series 440i. Please use the vehicle lookup tool on this page or check the Vehicle Fitment tab to confirm compatibility with your specific model and year before ordering.
Additional Information
| Weight | 4 kg |
|---|---|
| Dimensions | 62 × 48 × 27 cm |
| Brand |






