Audi RS4 B7 Fuel Line Pipe Fuel Distributor 4.2 FSI 079127509K

Audi RS4 B7 Fuel Line Pipe Fuel Distributor is an original fuel system component from the Lines, hoses and pipes category, designed for the 4.2 FSI performance engine in the RS4 B7 generation model. This used OEM part ensures factory-spec fuel flow geometry, which promotes stable engine operation under high loads and dynamic driving conditions.

Specifications and technical data

• SKU: 079127509K
• Mark: Audi
• Condition: Used
• OEM Part Number: 079127509K
• Substitutable numbers: 079127509K, 079 127 509 K
• Part type: Line
• Category: Hoses, Lines & Pipes

Function and application in the fuel system

The fuel distributor in the RS4 B7 4.2 FSI is responsible for precisely delivering fuel to individual sections of the injection system, maintaining proper flow distribution under high-pressure conditions. A correctly specified fuel line minimizes pressure drops, reduces the risk of cavitation, and supports uniform cylinder operation at the high RPMs characteristic of the 4.2 FSI unit. By maintaining the factory design, this component allows for the preservation of fuel supply parameters in accordance with the manufacturer's specifications, which is particularly important in high-output engines sensitive to any deviations in fuel delivery.

Construction and fitment for Audi RS4 B7 4.2 FSI

The fuel line acting as a distributor has been designed specifically for the architecture of the 4.2 FSI engine in the RS4 B7, taking into account the limited engine bay space and high operating temperatures. Properly shaped pipe sections and connection points ensure secure routing and stable mounting, which reduces stress and vibration during intensive use. Its original Audi origin means compatibility with factory brackets, connectors, and other fuel system components, which facilitates installation and allows for maintaining the serial routing of lines without the need for modifications.

Benefits of using an original fuel distributor

Using a pre-owned, original fuel distributor in the RS4 B7 4.2 FSI is a solution that combines controlled service costs with the preservation of factory operating parameters. This component from the Lines, hoses and pipes category, sourced as an OE part, ensures:

• retention of serial fuel flow characteristics across the entire RPM range,
• proper fitment to the existing mounting system and connectors,
• reduction of leakage risks resulting from imprecise aftermarket replacements,
• consistency with the factory fuel supply concept in the 4.2 FSI engine. For users operating the RS4 B7 in a dynamic manner, maintaining the serial configuration of the fuel system has a direct impact on performance stability and the refinement of the powertrain.

Characteristics of the used part

As a used component, the fuel distributor represents an attractive cost alternative to new parts while maintaining the manufacturer's original specifications. This type of component is particularly interesting for comprehensive repairs or rebuilding the fuel system in higher-mileage vehicles, where both technical compliance and a rational approach to the service budget are important. Choosing an original used part allows for maintaining the consistency of the entire fuel system with other OE components, which promotes predictable vehicle behavior and facilitates future diagnostics.

System expansion – related components

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 supply lines, flexible return hoses, or rigid guide pipes, check the available parts in the Audi lines, hoses and pipes category. If you are interested in a broader context regarding the economic use of original pre-owned parts and want to better understand how they affect vehicle operating costs, it is worth reading the article: Economic operation of Skoda vehicles – why original used parts are a sensible choice.