Header Question
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Blow Me
Joined: Feb 2003
Posts: 1,128
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From: Radford/Virginia Beach
Header Question
What is the difference in a 4-2-1 and 4-1 header. I know the difference physically but what do they do for performance. By the way i was wondering on a crx if that makes a difference.
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Joined: Nov 2002
Posts: 255
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From: VA Beach
4-2-1 will give you better mid-range acceleration, say between 2500 - 5000 rpms. 4-1 are all about top end acceleration, say after 4500 rpms or so, depending on the length of the primary exhuast runners.
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