What is the purpose of the Air Injection System in an Audi 80?

I recently noticed an additional system in my Audi 80 engine and was wondering what its purpose is. Any insights would be greatly appreciated.

The Air Injection System in an Audi 80 is designed to inject fresh air into the exhaust system in order to reduce harmful emissions.

In some Audi 80 models, the Air Injection System also helps to improve engine performance by increasing oxygen levels and aiding in fuel combustion.

If you're thinking of removing the Air Injection System in your Audi 80, it's important to note that this could result in failing emissions tests and potential damage to the engine.