MST Performance Air Intake Kit – BMW B58 3.0T (240i, 340i, 440i)
If you want more from your BMW’s straight-six engine, improving how it breathes is one of the most straightforward upgrades you can make. This air intake kit from MST Performance replaces the restrictive factory airbox with a free-flowing 4-inch intake pipe and cone filter, giving the B58 turbocharged engine a cleaner, more direct path to pull in cold air.
The result is a noticeable improvement in throttle response – the engine feels sharper and more eager when you put your foot down. MST Performance also report peak power gains of 15 to 20 bhp based on dyno testing, though real-world results will vary depending on your vehicle’s current state of tune and supporting modifications.
What You Get With This Kit
The intake pipe is finished in black powder coat and pairs with a matching heat shield to help keep hot engine bay air away from the filter. The filter itself is a dry cone-style unit – no oiling required – making it easy to clean and maintain over time. The whole system is designed to bolt into place without modification, keeping installation straightforward.
- 4-inch diameter intake pipe and air filter for improved airflow
- Black powder-coated inlet pipe and heat shield
- Dry cone air filter – easy to clean, no oil needed
- Sharper throttle response and a more audible induction note from the turbo
- Dyno-tested gains of up to 15-20 bhp at peak
Beyond the performance numbers, one of the more immediately noticeable changes is the sound. The B58 engine produces a much more pronounced induction and turbo noise with the factory airbox removed – something many BMW owners actively want from a car like this.
Vehicle Fitment
This kit is designed for 2019 and newer BMW models running the B58 3.0T straight-six engine. This covers the 240i, 340i, and 440i, including xDrive all-wheel drive variants. Please use the vehicle lookup tool on this site or check the Vehicle Fitment tab to confirm compatibility with your specific model and build year before ordering.
Additional Information
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