Audi A4 S4 B7 Quattro Petrol 4.2 V8 BBK Exhaust Manifold 079253034A

Audi A4 S4 B7 Quattro Petrol 4.2 V8 BBK Exhaust Manifold is an original exhaust system component designed for the right side of the petrol engine. Engineered by Audi specifically for the 4.2 V8 BBK unit, it ensures a precise fit to the cylinder head and stable exhaust gas discharge from this side of the engine. This solution is dedicated to the Quattro drivetrain, allowing the engine to maintain its factory performance characteristics.

Specifications and technical data

• SKU: 079253034A
• Mark: Audi
• Condition: Used
• OEM Part Number: 079253034A
• Substitutable numbers: 079253034A, 079 253 034 A
• Location on the vehicle: Right
• Fuel type: Petrol
• Category: Manifolds & Headers

Purpose and exhaust system fitment

The presented exhaust manifold has been constructed specifically for the 4.2 V8 BBK petrol engine in the Audi A4 S4 B7 model with Quattro drive. Its placement on the right side of the engine means it is responsible for collecting exhaust gases from the corresponding cylinder bank and directing them further into the rest of the exhaust system. Thanks to the factory geometry of the channels, the manifold supports proper cylinder filling, which translates into stable engine operation and the maintenance of stock performance.

The original Audi design ensures proper positioning relative to the cylinder head, gaskets, and subsequent exhaust components, which reduces the risk of leaks, unwanted vibrations, and thermal stress. This is particularly important in a high-revving V8 unit, where exhaust gas temperature and pressure are significantly higher than in typical four-cylinder engines.

Technical and functional characteristics

The exhaust manifold belongs to the Exhaust manifolds category, meaning it plays a key role in the first stage of discharging exhaust gases from the combustion chambers. The design adapted for petrol fuel allows for safe operation at high temperatures typical of naturally aspirated V8 engines. The properly selected length and cross-section of the channels promote even cylinder scavenging, which helps maintain engine refinement and proper throttle response.

The component intended for the right side of the vehicle is designed with consideration for the limited space in the engine bay, the routing of electrical harnesses, auxiliary equipment, and the Quattro drivetrain. As a result, installation is straightforward, and the manifold does not interfere with other components. For the user, this means easier maintenance and a lower risk of installation issues.

Condition, application, and benefits of installation

The offered manifold is a used part, which in practice allows for an economical repair of the exhaust system while maintaining the manufacturer's original specifications. Replacing a damaged or cracked manifold with a factory equivalent helps eliminate common symptoms such as louder engine operation when cold, power loss, or errors related to exhaust system leaks. For the 4.2 V8 BBK engine, this is significant both in terms of performance and the correct operation of lambda sensors and catalytic converters located further down the system.

Choosing an original Audi manifold also offers installation benefits: retention of stock mounting points, proper fitment with gaskets, and compatibility with factory heat shields. This allows a mechanic to carry out the replacement in a predictable manner, without the need for modifications or fitting universal parts.

Technical support, selection, and exhaust system development

When selecting an exhaust manifold for an Audi A4 S4 B7 Quattro with a 4.2 V8 BBK petrol engine, it is crucial to verify compatibility with the engine unit and the installation side. It is worth paying attention to the condition of the mating surfaces, threads, and mounts to ensure a leak-free connection with the cylinder head and the rest of the system after installation. In the case of planned exhaust upgrades – for example, installing performance mufflers or catalytic converters – keeping the original manifold often provides a stable base that facilitates further modifications without interfering with the geometry at the cylinder head.

If you want to better understand the impact of the manifold on engine performance and characteristics and are considering different exhaust configurations, it is worth checking out our guide on performance exhaust systems: Performance exhaust system: used manifolds and sports catalytic converters on the road. You will find practical tips there regarding the selection of used manifolds for premium brands, including Audi.

Expanding repairs within the Audi exhaust system

If you are planning a comprehensive repair or upgrade of the exhaust system area in your Audi and need other components from the same group, such as additional manifolds, connecting sections, or mounting hardware, check out the available parts in the Audi Exhaust manifolds category.