MST Performance BMW M240i (G42) / M340i (G2X) B58 Induction Kit
The MST Performance induction kit is a straightforward performance upgrade for BMW’s B58 turbocharged engine, fitted to the M240i (G42) and M340i (G20, G21, G22, G23). It replaces the factory airbox with a freer-flowing intake setup, giving the turbocharger a better supply of cold, dense air – which is exactly what it needs to work efficiently.
The result is improved throttle response, a more engaging intake sound under acceleration, and genuine power gains. MST quote dyno-tested figures of up to 12-14bhp, though as with any intake upgrade, actual gains will vary depending on your vehicle’s current state of tune and supporting modifications.
What’s Included
- Black powder-coated heat shield
- Black powder-coated 4″ inlet pipe
- 4″ red dry pleated performance filter
- Silicone joiner
- Full fitting hardware and step-by-step instructions
Why It Makes a Difference
The standard airbox on these BMWs is designed with noise reduction and emissions compliance in mind, which means it restricts airflow more than is ideal for performance. This MST kit removes that restriction, routing cooler air more directly to the turbocharger. The powder-coated heat shield helps keep heat from the engine bay away from the filter, so the air entering the turbo stays as cool and dense as possible.
The dry pleated filter is easy to maintain – it can be cleaned and reused rather than replaced each service interval, making it a practical long-term upgrade. There’s no oil to apply, which also reduces the risk of contaminating the mass airflow sensor (the sensor your engine uses to measure incoming air).
Whether your B58 is completely standard or already running an ECU remap (a software tune to the engine’s control unit), this kit complements both setups. On a remapped car in particular, improving airflow can help the tune breathe more freely and deliver its full potential.
Fitment
This kit is designed to fit BMW B58 engine applications including the M340i (G20, G21, G22, G23) and M240i (G42). 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 |
|---|---|
| Brand |





