BMW 1 3 Series F20 F21 F30 LCI M140i 340i B58 Sliding Bar Exhaust Manifold

The BMW F20 F30 M140i 340i Manifold Clamp is an original part from the Exhaust Manifolds category, designed for use in modern BMW F-series engines. The precise clamp ensures stable mounting of the manifold, which translates to correct exhaust system operation and repeatable engine working conditions. Thanks to its OEM design, the part maintains factory fitment and is the right choice for professional repair or system reconstruction.

Specifications and technical data

• SKU: 7643151
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7643151
• Substitutable numbers: 11657643151, 7643151, EM
• Category: Manifolds & Headers

Purpose and Function in the Exhaust System

The manifold clamp in BMW F20 and F30 models with M140i and 340i engines is responsible for evenly pressing the manifold against the cylinder head. Proper clamping reduces the risk of leaks, exhaust pressure loss, and unwanted vibrations. In practice, this translates to:

• stable operating conditions for the turbocharger and lambda sensors,
• maintaining the seal of the manifold-to-head connection,
• reducing thermal stress on seals,
• more repeatable engine performance parameters under load.

For high-performance engines, such as the M140i and 340i, a properly selected clamp is a crucial component ensuring the durability of the entire exhaust system.

Advantages of Using an Original BMW Clamp

The original BMW Manifold Clamp has been designed for the specific geometry of the cylinder head and manifold, minimizing the risk of stress and deformation during high-temperature operation. Compared to aftermarket alternatives, it offers:

• factory fitment to the manifold mating surface,
• appropriately selected stiffness and resistance to thermal cycles,
• compatibility with original mounting hardware,
• consistency with BMW service documentation.

This ensures predictable installation and reduces the risk of subsequent exhaust system intervention after a short period of use.

Condition, Origin, and Service Application

The presented BMW F20 F30 M140i 340i Manifold Clamp is a used part, sourced from disassembly, making it an attractive option for economical vehicle repair while retaining an OEM component. This type of part is particularly suitable in situations where:

• the original clamp has deformed due to overheating,
• leaks have occurred at the manifold-to-head interface,
• exhaust system reconstruction is necessary after modifications or a collision,
• maintaining the original BMW technical specification is a priority.

Choosing a used OEM part helps maintain the system's structural integrity, which is important for both daily-driven cars and enthusiast projects.

Integration with the Exhaust System and Part Selection

The clamp works directly with the exhaust manifold and mounting components. Therefore, when replacing it, it's advisable to check the condition of the mating surfaces, bolts, and seals. Proper selection of the component for a specific BMW F20/F30 engine variant is crucial for maintaining system seal and correct geometry. The product has an assigned OEM part number and interchangeable numbers, which facilitates verification of compatibility with your specific vehicle configuration.

If you plan to replace other exhaust system components in BMW vehicles during servicing, check the available parts in the BMW Exhaust Manifolds category.

Technical Support and Exhaust System Knowledge

For users planning upgrades or more extensive exhaust system modifications – such as installing performance parts or selecting used manifolds – knowledge about the impact of individual components on engine performance will be beneficial. An extended discussion on selecting manifolds, catalytic converters, and associated components can be found in the article Performance Exhaust Systems: Used Sport Manifolds and Catalytic Converters on the Road.

If you are interested in the broader context of differences between standard components and the M and M Performance lines in BMW cars, it is also worth reading the material BMW M Performance: How Do BMW M Components Differ from Standard Ones?, which discusses, among other things, the importance of properly selected components in higher-performance vehicles.