Audi S5 8T Quattro Petrol 4.2 FSI V8 Exhaust Manifold Cyl. 1-4 079253034AK

Audi S5 8T Quattro Petrol 4.2 FSI V8 Exhaust Manifold Cyl. 1-4 is an original exhaust system component from the Exhaust manifolds group, designed for the V8 petrol engine in the Audi S5 8T model with Quattro drive. This is a used OEM component that allows for maintaining the factory exhaust flow characteristics, the sound of the 4.2 FSI unit, and proper integration with other exhaust system elements.

Specifications and technical data

• SKU: 079253034AK
• Mark: Audi
• Condition: Used
• OEM Part Number: 079253034AK
• Substitutable numbers: 079253034AK, 079 253 034 AK
• Fuel type: Petrol
• Category: Manifolds & Headers

Purpose and function in the exhaust system

The presented manifold serves the first bank of cylinders (1–4) in the 4.2 FSI V8 engine, responsible for collecting exhaust gases from individual exhaust ports and routing them to the rest of the system. A correctly selected manifold in this model is crucial for:

• maintaining proper backpressure in the exhaust system,
• stable operation of the V8 unit across the entire rev range,
• preserving factory power and torque parameters,
• correct interaction with lambda sensors and the engine management system.

By maintaining the factory channel geometry, the manifold supports even cylinder scavenging, which is particularly important in the high-revving 4.2 FSI petrol engine.

Construction and technical characteristics

The exhaust manifold with this reference is an OEM part designed specifically for the 4.2 FSI V8 unit in the Audi S5 8T Quattro. The construction has been optimized for:

• resistance to high exhaust temperatures typical of high-performance petrol engines,
• mechanical rigidity under varying thermal load conditions,
• correct positioning relative to the cylinder head and subsequent exhaust sections.

The factory Audi solution ensures compatibility with original mounts, accessories, and heat shields, which facilitates installation and reduces the risk of leaks at the cylinder head interface.

Application in the 4.2 FSI V8 petrol engine

The exhaust system in the Audi S5 8T with a 4.2 FSI V8 engine operates under very demanding thermal and pressure conditions. Using the correct manifold for cylinders 1–4 allows for:

• maintaining the proper operating temperature of the exhaust valves,
• minimizing the risk of cracks resulting from uneven heating,
• ensuring stable sensor readings in the engine control system,
• preserving the characteristic, smooth sound of the V8 unit.

For FSI-type petrol engines, tightness and proper exhaust routing are particularly important, which is why using an original manifold is a safe solution for repairs and restoring the vehicle to factory condition.

Condition, installation, and service application

The item comes from the Exhaust manifolds category and is offered as a used part, allowing for an economical repair of the exhaust system while maintaining original Audi specifications. The manifold is intended for direct installation in place of the factory component, using standard mounting points and original seals provided by the manufacturer.

In workshop practice, such a component will prove useful both when replacing a damaged manifold (e.g., after cracking or deformation) and when restoring a car to its OEM configuration after previous exhaust modifications.

Exhaust system expansion and additional materials

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 additional manifolds, connecting sections, or mounting hardware, check the available parts in the Audi Exhaust manifolds category.

For those considering broader modifications or wanting to better understand the impact of the manifold on performance and system operation characteristics, we recommend the guide article Performance exhaust system: used manifolds and sports catalytic converters on the road, which discusses, among other things, the selection of used manifolds for premium brands, including Audi.