Extractors V Headers

Ok I had a discussion earlier with a member on here about extractors v headers, from what I had learn't they were the same thing, but this member dared challenge that information, so I dived a little further asking a engine builder.
I thought it was just another Aussie/Yank meaning thing but after speaking and doing some more research I may have been wrong, And so is pacemaker.com.au
But I thought it was as simple as
exhaust manifold = headers = extractors.
But 2 people and something on google said that they are different depending on what you are trying to acheive, and how the pipes are ran.
Headers just allow the gases to flow out, using 4/6/8 lengths of tube all the same length into a collector
Extractors apparently are designed for "power extraction" and the way they are designed cause a venturi effect pulling the gasses out (semi quoted off a member on this forum)
Someone explain tell me if I'm right or wrong.
Oh and to that Member if I'm wrong and you were right no need to get on your high horse about it, its what I learn't over the years and its what you learnt off your F1 Mclaren head mechanic that comes to tafe and teaches you and least I done some research to find out who was right and wrong, like I always do
I thought it was just another Aussie/Yank meaning thing but after speaking and doing some more research I may have been wrong, And so is pacemaker.com.au
But I thought it was as simple as
exhaust manifold = headers = extractors.
But 2 people and something on google said that they are different depending on what you are trying to acheive, and how the pipes are ran.
Headers just allow the gases to flow out, using 4/6/8 lengths of tube all the same length into a collector
Extractors apparently are designed for "power extraction" and the way they are designed cause a venturi effect pulling the gasses out (semi quoted off a member on this forum)
Someone explain tell me if I'm right or wrong.
Oh and to that Member if I'm wrong and you were right no need to get on your high horse about it, its what I learn't over the years and its what you learnt off your F1 Mclaren head mechanic that comes to tafe and teaches you and least I done some research to find out who was right and wrong, like I always do
