No, not even the Atenza, the Atenza IS the 6. They're the same car. Really, trust me on this one. It's like 3000GT/GTO, it's the same car, different name. And yes, Atenza parts fit on the 6 with the exception of parts that are region specific. The N/A bumpers are different, and so are the fog lights, but that's about it. All the other parts fit, because they're from the same car.