Audi A5 S5 8T 4.2 V8 FSI CAUA Centre Fuel Pipe Hose Distribution 079127507AF

Audi A5 S5 8T 4.2 V8 FSI CAUA Centre Fuel Pipe Hose Distribution is an original fuel system component designed for the 4.2 V8 FSI engine in Audi A5 / S5 8T models. Thanks to its factory geometry and precise fit for the CAUA engine, it ensures stable fuel delivery between system components, supporting proper injection performance and even fuel supply to the cylinders.

Specifications and technical data

• SKU: 079127507AF
• Mark: Audi
• Condition: Used
• OEM Part Number: 079127507AF
• Substitutable numbers: 079127507AF, 079 127 507 AF
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel system

The centre fuel pipe in the 4.2 V8 FSI engine is responsible for the precise distribution of fuel between individual sections of the supply system. In high-power units such as the CAUA, correct fuel flow is crucial for:

• maintaining stable pressure in the fuel rails,
• even fuel dosing to all cylinders,
• reducing power drops and hesitation under load,
• maintaining the proper operating characteristics of the V8 FSI engine.

Selecting the correct fuel pipe dedicated to the Audi A5 / S5 8T with a 4.2 FSI engine helps avoid issues with leaks, incorrect hose routing, and mounting incompatibilities.

Construction, fitment, and installation

This item belongs to the Hoses, lines, and pipes group, meaning it was designed as part of the working medium transfer system – in this case, fuel. The pipe's construction is adapted to:

• the engine bay geometry of the Audi A5 / S5 8T with a 4.2 V8 FSI unit,
• factory mounting points and hose routing,
• compatibility with original connectors and other fuel system components.

Such fitment facilitates installation and limits the need for modifications, which is particularly important when working in the densely packed V8 engine bay. Original Audi branding helps maintain factory flow parameters and resistance to operating conditions (temperature, vibration, pressure).

Benefits of using an original fuel pipe

Using a dedicated fuel pipe in the Audi A5 / S5 8T 4.2 V8 FSI CAUA allows for maintaining the integrity of the entire supply system. In practice, this means:

• compliance with the factory FSI engine specification,
• reduced risk of leaks in the critical fuel supply area,
• proper hose routing, without tension or twisting,
• easier diagnostics and future service due to maintaining the original layout.

This used condition item can be an attractive cost-effective alternative while maintaining original build quality, especially for routine repairs or restoring the completeness of the fuel system in a CAUA engine.

Part selection by numbers and integration with other components

The centre fuel pipe has a dedicated OEM part number and related interchangeable numbers, which facilitates verifying compatibility with a specific Audi A5 / S5 8T configuration. When selecting, it is worth using the Vehicle Identification Number (VIN) and service documentation to confirm compatibility with the specific 4.2 V8 FSI engine version.

For users interested in a broader approach to upgrading or servicing turbocharged units, the Global Parts guide on selecting accessories for BMW engines may be useful. In such a case, it is worth checking the article: BMW B58 code – checklist before buying a turbocharger and intercooler, which shows how to verify the compatibility and parameters of forced induction system components step by step.

Expanding Audi fuel system service

If you are planning a comprehensive repair or upgrade of the fuel system area in your Audi and need other items from the same group, such as additional lines, flexible hoses, or rigid supply pipes, check the available parts in the Audi hoses, lines, and pipes category.

In summary, Audi A5 S5 8T 4.2 V8 FSI CAUA Centre Fuel Pipe Hose Distribution is a technically matched fuel system component that helps maintain proper fuel flow in the demanding V8 FSI unit. Choosing an original Audi component supports stable engine operation, correct pipe routing geometry, and predictable vehicle performance in daily use.