Quote:
Originally Posted by Floordford
Exhaust Manifold- the stock, cast metal exhaust component that channels exhaust gas from the engine into the exhaust system.
Exhaust Header- the aftermarket tubular exhaust component that channels exhaust gas from the engine into the exhaust system. Made in different configurations. Long tube style, shorty style which is usually a direct stock replacement, mid length style.
Basically a manifold is stock and a header is aftermarket.
WRONG!!!!!!!!!!
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Many cars come with factory headers........surprise!!!
example: Infiniti Q45
But you were kinda close in a guessing kinda way.
A header implies tubes to each exhaust port. usually equal length
a mainifold is usually cast metal. all ports tend to dump into one.