BMW M140i, M240i 340i & 440i B58 Stage 2 Hardware Package

Transform your BMW M140i, M240i, 340i, or 440i with the B58 Stage 2 Hardware Package, engineered to deliver over 400 BHP and 600 Nm of torque when paired with a professional ECU tune. This kit includes the essential hardware upgrades required for Stage 2 performance, improving throttle response, enhancing airflow, and producing a deeper, more aggressive exhaust tone — while maintaining smooth daily drivability.

Each component in this package has been precision-engineered for the B58 engine platform, ensuring perfect fitment, reliability, and consistent performance. Designed for enthusiasts who want to unlock the full potential of their BMW, this setup provides the ideal hardware foundation for custom ECU tuning.

Key Features

• Compatible with BMW M140i, M240i, 340i & 440i (B58 engine)

• Supports 400+ BHP and 600 Nm with appropriate tuning

• High-flow 5" downpipe improves exhaust gas flow, turbo spool, and throttle response

• Performance air filter optimises airflow for increased power and smoother delivery

• Maintains factory drivability with enhanced performance and sound

What’s Included?

• Scorpion 5" Decat Downpipe

• K&N High-Flow Panel Air Filter

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.

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

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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.