Air intake system, Intake manifold, All <a href="https://garage.wiki/audi/engines/gasoline/straight-5/25-l/ctsa/" title="Audi gasoline straight-5 2.5 L CTSA engine DIY maintenance and service manual">Audi gasoline straight-5 2.5 L CTSA</a> engines, Lower section of intake manifold, First stage

by Roman Paulov