What is Secondary Air Injection (SAI)?
Certain Audi’s and Volkswagens are equipped with a Secondary Air Injection systems which run off the stock air intake box. It is important to know if your car is equipped with this system as...
Certain Audi’s and Volkswagens are equipped with a Secondary Air Injection systems which run off the stock air intake box. It is important to know if your car is equipped with this system as...
Important Notes: If your car has a secondary air injection (CBFA engine code) you will need a secondary air filter.