MST Performance Induction Kit For BMW G01 X3 M40i & G02 X4 M40i

The MST Performance Induction Kit (MST-BW-X301) is designed to optimise airflow, turbo efficiency and induction sound for the pre-LCI BMW G01 X3 M40i and G02 X4 M40i. This high-performance intake system replaces the restrictive factory airbox with a free-flowing, precision-engineered setup that enhances both throttle response and noise.

This kit includes a high-flow performance air filter, a heat-shielded airbox, and smooth aluminium pipework for reduced turbulence and improved airflow. Expect a deeper, more pronounced turbo sound under acceleration and improved engine responsiveness across the rev range. It’s a direct bolt-on solution that retains all OEM mounting points and sensors for a seamless install.

Key Features

• Increased airflow and reduced turbo lag
• High-flow performance air filter
• CNC-machined sensor housing for OEM compatibility
• Powder-coated heat shield to protect from engine bay heat
• Improved turbo spool and induction sound
• Direct-fit design with no cutting or permanent modifications
• All required hardware included

Compatibility

• BMW G01 X3 M40i (B58 engine – 2018–2022)
• BMW G02 X4 M40i (B58 engine – 2018–2022)

Not compatible with post-2022 models using the updated B58TU2 engine.

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.