Audi RS4 B8 RS5 8T Inlet Intake Manifold 4.2 FSI CFSA Petrol 079133185CS

Audi RS4 B8 RS5 8T Inlet Intake Manifold 4.2 FSI CFSA Petrol is an original part from the Intake manifolds group, designed for 4.2 FSI CFSA petrol engines in Audi RS4 B8 and RS5 8T sports models. This used OEM intake manifold ensures factory-spec runner geometry, proper airflow, and stable operating conditions for the engine, which is essential for both daily driving and dynamic performance.

Specifications and technical data

• SKU: 079133185CS
• Mark: Audi
• Condition: Used
• OEM Part Number: 079133185CS
• Substitutable numbers: 079133185CS, 079 133 185 CS
• Fuel type: Petrol
• Category: Intake Manifolds

Purpose and compatibility

The presented intake manifold is designed for use with the naturally aspirated 4.2 FSI CFSA petrol engine fitted in the Audi RS4 B8 generation and Audi RS5 8T. The OEM construction guarantees proper fitment to the cylinder heads, engine accessories, and the stock control system, without the need for mounting modifications or additional alterations.

By maintaining factory specifications, the manifold supports correct cylinder filling, which translates into predictable torque and power characteristics, crucial for high-performance vehicles.

Construction and role in the intake system

The intake manifold in the 4.2 FSI CFSA engine is responsible for evenly distributing air to all cylinders and maintaining stable flow conditions across the entire RPM range. The properly selected chamber volume and runner shape contribute to:

• efficient cylinder filling at high RPM,
• maintaining engine refinement at low and medium engine speeds,
• proper cooperation with the FSI direct injection system.

The original manifold design is optimized for the V8 engine, which allows for the characteristic linear throttle response and stable operating parameters under a wide range of loads.

Benefits of using an original intake manifold

Using a factory intake manifold in an Audi RS4 B8 or RS5 8T allows for compliance with the manufacturer's airflow requirements, which is important for diagnostics, tuning, and vehicle operation. Compared to aftermarket replacements with uncertain geometry, the original part promotes:

• stable sensor readings and correct engine control unit operation,
• maintenance of stock performance parameters,
• easier integration with other intake system components and accessories.

For high-power petrol engines such as the 4.2 FSI CFSA, maintaining proper airflow is crucial for durability and performance consistency, which is why choosing an original intake manifold is a technically sound solution.

Application in the 4.2 FSI CFSA petrol engine

The 4.2 FSI CFSA engine is a high-revving petrol unit where the intake system operates under demanding thermal and flow conditions. The intake manifold must provide adequate rigidity, sealing, and resistance to temperature changes to maintain stable mixture parameters and proper operation of the injection system.

Selecting a manifold dedicated to this type of petrol engine reduces the risk of leaks, flow disturbances, or ECU adaptation issues, which is particularly important in cars used both on public roads and in more dynamic driving conditions.

Technical support and system development

If you are planning further modifications in the area of exhaust flow, manifold selection, or exhaust system components in cars such as the Audi RS4, RS5, or other premium class models, it is worth expanding your knowledge about the impact of these components on engine operation. Practical tips on selecting used manifolds and performance parts can be found in the article Performance exhaust system: used manifolds and sports catalytic converters on the road.

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other parts from the same group, such as intake manifolds, intake runner components, or parts working with the air supply system, check out the available parts in the Audi intake manifolds category.