BMW F20 F30 LCI M140i M240i 340i 440i B58 Turbocharger Exhaust Manifold 7643147

The BMW F20 F30 LCI M140I M240I 340I 440I B58 Turbo Exhaust Manifold 7643147 is an original turbocharger and parts component designed for the modern B58 engines in the sporty BMW 1, 2, 3, and 4 Series models after the facelift. This used turbo exhaust manifold provides a functional base for restoring the factory turbocharger to its original condition or for a sensible upgrade based on an OEM component.

Specifications and technical data

• SKU: 9423787-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9423787
• Substitutable numbers: 9423787, 11659423787
• Category: Turbos & Parts

Purpose and application in the B58 engine

This turbo exhaust manifold is designed to fit the B58 petrol engine used in the M140i, M240i, 340i, and 440i versions of the F20/F30 facelift. It's a key component of the turbocharging system that:

• guides exhaust gases from the cylinder head to the turbocharger, ensuring adequate pressure to drive the impeller,
• supports stable performance across the full rev range,
• maintains the factory power and torque characteristics provided by BMW for the B58 engine.

By maintaining the original geometry of the exhaust gas channels, the manifold allows the turbocharger to maintain correct operating conditions, which has a direct impact on the dynamics, operating culture and thermal safety of the engine.

OEM design and benefits of using the original manifold

As an OEM component from BMW, the turbo exhaust manifold offers:

• factory fit for the B58 engine head and turbocharger used in the F20, F30 and related models,
• the body stiffness designed by the manufacturer, reducing the risk of cracks under high thermal loads,
• appropriately selected wall thickness and shape of exhaust gas channels, which helps maintain proper flow and temperature.

In practice, this means there is no need for modifications, drilling or adjustments – the collector is installed in place of the factory element, maintaining the original installation and fittings.

Used condition and profitability of repair

The turbo exhaust manifold offered is in used condition, significantly reducing repair costs compared to a new OEM component. For many BMW B58 sports car owners, this means:

• an economical solution when replacing a damaged or overheated collector,
• the chance to keep the original specification without resorting to unreliable substitutes,
• possibility of using parts in service, renovation or light tuning projects.

Used condition is particularly attractive in cars used dynamically, where a reasonable balance between costs and maintaining the factory quality and operating characteristics of the supercharging system is important.

Why choose BMW OEM turbochargers and parts?

For supercharged engines like the B58, using components with predictable performance is crucial. The original BMW turbo exhaust manifold provides:

• consistency with other components of the exhaust and intake system,
• stable operating conditions of the turbocharger at standard and moderately increased power,
• easier diagnostics – the mechanic works on a known, factory design.

If you are looking for other turbocharger and parts components for this brand, check out our offer for turbochargers and parts for BMW to select compatible components for your project.

Eco-tuning and the use of used supercharging components

Choosing a used turbo exhaust manifold not only saves money but also significantly reduces your carbon footprint by reusing functional components. Eco-tuning, combining improved performance with a responsible approach to resources, is playing an increasingly important role in modern vehicle modifications.

If you want to better understand how used turbocharger components fit into this approach, see the article Eco-tuning in practice: how to increase performance while reducing your carbon footprint with recycled parts , which provides practical tips for conscious parts selection.

Summary

The BMW F20 F30 LCI M140I M240I 340I 440I B58 Turbo Exhaust Manifold 7643147 is an original, used turbocharger component from the Turbocharger & Parts category, designed for modern six-cylinder BMW engines. It provides factory fit, predictable high-temperature performance, and allows you to restore full turbo system functionality within a reasonable budget, while also aligning with the concept of informed, technically sound vehicle modernization.