Audi RS4 B8 RS5 8T Fuel Pipe Hose Line 4.2 V8 FSI Petrol 079127509BT

Audi RS4 B8 RS5 8T Fuel Pipe Hose Line 4.2 V8 FSI Petrol is an original fuel system component designed for high-performance petrol engines. Thanks to its factory-fit for RS4 B8 and RS5 8T models, it ensures stable fuel delivery and proper operation with the 4.2 V8 FSI unit. This is a solution for users who expect reliable fuel system performance during dynamic driving.

Specifications and technical data

• SKU: 079127509BT
• Mark: Audi
• Condition: Used
• OEM Part Number: 079127509BT
• Substitutable numbers: 079127509BT, 079 127 509 BT
• Fuel type: Petrol
• Part type: Pipe
• Category: Hoses, Lines & Pipes

Purpose and compatibility

The pipe has been designed specifically for sporty Audi models with the 4.2 V8 FSI petrol engine. The construction meets the requirements of high-power-density units, where precise and stable fuel delivery across the entire load range is crucial. The item belongs to the Pipes, hoses and lines group, which guarantees full integration with the factory fuel supply system.

Technical characteristics of the fuel pipe

The fuel pipe operates in a petrol system where maintaining proper pressure and tightness under high-temperature conditions and variable loads is required. The pipe's construction is adapted for:

• fuel transport in an FSI-type petrol engine,
• operation in the elevated temperatures of the engine bay,
• maintaining appropriate flexibility while remaining resistant to vibrations.

These properties promote stable operation of the injection system, which translates into uniform cylinder fueling and predictable throttle response.

Application in the 4.2 V8 FSI engine

In 4.2 V8 FSI units, precise fuel routing has a direct impact on engine refinement, performance, and operational safety. A properly selected fuel pipe:

• reduces the risk of pressure drops in the supply system,
• supports stable injection operation without interference,
• helps maintain the correct air-fuel mixture parameters.

As a result, the fuel system remains consistent with the factory design specifications, which is particularly important in cars with a sporty character.

Condition of the item and benefits of installation

The offered fuel pipe is in Used condition, meaning it has been removed from a vehicle but is still suitable for further use after proper installation and verification by a mechanic. Choosing an original used part allows you to maintain factory routing and compatibility with other fuel system components, while reducing costs compared to purchasing a new part.

A properly selected fuel pipe from this group of components can be a beneficial solution for:

• repairs following fuel system leaks,
• restoring the factory configuration after modifications,
• comprehensive maintenance of an FSI petrol engine.

Expanding the pipe system in Audi

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

Additional information and best practices

When replacing a fuel pipe in a petrol engine, it is worth paying attention to the condition of other system elements – connectors, clamps, and mounting points. Installation should be performed in accordance with safety procedures for fuel systems, including bleeding and leak testing after starting the engine. It is also good practice to periodically visually inspect the pipes for chafing and signs of material aging.

For a comparison of manufacturers' approaches to original used parts and ways to maintain high comfort and vehicle durability, you can read the article Mercedes – comfort, prestige and durability. Why is it worth choosing original used parts?, which discusses the advantages of using factory components from the secondary market in premium class cars.