Audi RS4 B8 8K 4.2 CFSA Quattro Air Filter Intake Duct Right O/S 8T0129906A

Audi RS4 B8 8K 4.2 CFSA Quattro Air Filter Intake Duct Right O/S is an original component from the Air filter housings group, designed specifically for the sporty V8 quattro unit. It precisely directs air to the right side of the intake system, supporting stable engine performance and consistent flow characteristics.

Specifications and technical data

• SKU: 8T0129906A
• Mark: Audi
• Condition: Used
• OEM Part Number: 8T0129906A
• Substitutable numbers: 8T0129906A, 8T0 129 906 A
• Location on the vehicle: Right
• Category: Air Filter Housings

Purpose and function in the intake system

The described intake duct is a component of the right side of the air intake system in the Audi RS4 B8 generation with the 4.2 CFSA engine and quattro drive. Its task is to direct air from the front area of the body to the air filter housing, while maintaining proper flow geometry and fitment within the engine bay.

Thanks to its factory design, it ensures:

• stable air stream guidance to the right part of the filter housing,
• correct positioning relative to other intake components,
• maintenance of the factory performance characteristics of the 4.2 CFSA unit.

Construction and fitment for Audi RS4 B8

As an element from the Air filter housings group, the duct has been designed for the specific Audi RS4 B8 8K body, taking into account the limited space in the engine bay and thermal requirements. The shape and mounting points are adapted to factory brackets, which facilitates installation and minimizes the risk of material stress.

Placement on the right side of the vehicle allows for:

• correct connection with the right part of the filter housing,
• collision-free routing relative to engine accessories,
• maintenance of the factory intake duct routing in the Quattro version.

Component condition and service application

The product is a used original Audi component, which means it retains the factory geometry and compatibility with the RS4 B8 intake system. This type of element is suitable both for a standard replacement of a damaged duct and for restoring the car to OEM configuration after intake modifications.

In practice, the right-side intake duct is particularly useful when:

• the original element has cracked or deformed,
• there are leaks in the area of the air filter housing,
• it is necessary to restore the factory air flow in the 4.2 CFSA engine.

Benefits of using an original intake housing

Using an original right-side intake duct allows for maintaining the consistency of the entire air intake system, which is important for the operation of mass air flow sensors, ignition maps, and performance stability. Factory fitment reduces the risk of vibrations, leaks, and unwanted air turbulence that may occur with non-original parts.

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as intake ducts, covers, or air routing sections, check the available parts in the Audi Air filter housings category.

Summary

Audi RS4 B8 8K 4.2 CFSA Quattro – right side air filter intake duct is a solution intended for users who want to maintain the factory engine performance and correct air routing in the intake system. The original design, fitment for the 8K body, and compatibility with the Quattro version make it a functional choice for repairs and restoring the car to factory specifications.