are headers and exhaust manifold the same thing?

5

Asked by Feb 27, 2009 at 04:22 AM

Question type: Car Customization

2 Answers

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They have the same basic function of collecting the exhaust gasses out of the exhaust ports of the block and funneling them down towards the cat/muffler etc. The main differences is that an exhaust manifold is usually a big rough cast piece of metal with exhaust passages cast into it, whereas headers are usually painstakingly welded together from sections of pipe. Headers area often designed in such a way as to have similar lengths of piping for each cylinder or specially tuned lengths to take advantage of pressure wave tuning and tend to look like a nest of snakes rather than a big solid cast manifold. The pressure wave tuning and flow benefits of headers are beneficial to high performance applications where cost is less of an issue.

basicly yes

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