Extractors are for NA (naturally aspirated) cars with no turbos. It sits on the head and goes into a dump/front and onto the exhaust.
Turbo cars have a manifold, on which the turbo sits on, and the exhaust sits on the back of the turbo.
For turbo cars you cant get extractors, but you can get different forums of manifold, say tuned length, log style, high mount or low mount log style, high mount or low mount tuned length, and the obvious ones like polished which yeh is obviously just polished lol
Hope that helps a bit.