With a 12% global market share, the Volkswagen Group is currently the largest automaker in the world. They own 12 car brands (VW, Audi, Seat, Skoda, Bentley, Bugatti, Lamborghini, Porsche, Scania, Man & Ducati), with 130 plants and 600,000 employees that build around 40,000 vehicles every week. In 2014, VW sold 10.1 million vehicles worldwide, and many of them used the same chassis and engine architecture. This streamlined manufacturing allows many VW Group models to share the same basic components, like air intake assemblies. It also enables a single high-flow performance air cleaner to fit many different VW models. For that reason, a 2003 Volkswagen Golf 2.0L can benefit from the same K&N Replacement Air Filter as a 2016 Audi Q3 2.0L, part 33-2865. Those are two completely different engines. But you can increase the performance on both of them, by simply allowing the engine to breathe.