Audi RS4 B7 Exhaust Outlet Manifold Cyl. 5-8 Left N/S 4.2 V8 BNS 079253033F

Audi RS4 B7 Exhaust Outlet Manifold Cyl. 5-8 Left N/S 4.2 V8 BNS is an original exhaust system component designed for the 4.2 V8 petrol engine with the BNS code. Engineered by Audi, it ensures proper exhaust gas discharge from the left cylinder head, stable engine performance, and the maintenance of factory power output and sound characteristics.

Specifications and technical data

• SKU: 079253033F
• Mark: Audi
• Condition: Used
• OEM Part Number: 079253033F
• Substitutable numbers: 079253033F, 079 253 033 F
• Location on the vehicle: Left
• Fuel type: Petrol
• Part type: Exhaust Manifold
• Category: Manifolds & Headers

Purpose and function in the exhaust system

This exhaust manifold is dedicated to the high-performance V8 engine in the Audi RS4 B7 generation and is responsible for collecting exhaust gases from cylinders 5–8 on the left side. The precisely selected channel geometry allows for uniform cylinder scavenging, which promotes stable engine operation at high RPMs and reduces unfavorable exhaust turbulence.

The component is designed to work with a petrol-powered system, ensuring appropriate thermal and mechanical resistance under conditions typical for a high-revving naturally aspirated engine.

Construction and fitment

The manifold is intended for installation on the left side of the vehicle, on the cylinder head covering cylinders 5–8. The factory placement of mounting points and the connection flange to the rest of the exhaust system facilitates installation and allows for the retention of standard pipe routing and accessories.

The original Audi design ensures:

• compatibility with factory gaskets and mounting hardware,
• proper positioning relative to the engine block and engine bay,
• maintenance of factory clearance and exhaust system routing.

Benefits of using an original used manifold

Choosing a used Audi exhaust manifold for the RS4 B7 allows for a significant reduction in repair costs compared to a new part, while maintaining factory specifications. The original dismantled part is structurally compliant with the manufacturer's requirements, which minimizes the risk of fitment issues, leaks, or unwanted changes in engine performance characteristics.

For vehicles driven dynamically, including track use, utilizing a stock manifold with proven durability is a sensible solution that allows for maintaining repeatable engine performance without the need for ECU remapping or modifications to other exhaust system components.

Application in service and performance projects

This manifold model is suitable both for standard replacement of a worn or damaged part and for projects where maintaining the original Audi RS4 B7 specification is a priority. Thanks to the factory channel geometry and stock cross-section, the manifold does not require additional modifications regarding sensor mounting, pipe routing, or heat shields.

If you want to better understand the impact of the manifold on performance and engine characteristics, and learn practical tips on selecting used exhaust system components, check out the article Performance exhaust system: used manifolds and sports catalytic converters on the road, which discusses, among other things, solutions used in Audi vehicles.

Expanding the Audi exhaust system

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other components from the same group, such as manifolds for the opposite cylinder bank, connecting sections, or mounting elements, check out the available parts in the Audi exhaust manifolds category.