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4-2-1 and 4-1 headers

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eclipse13

20+ Year Contributor
925
2
Jan 5, 2003
wilmington, North Carolina
What is the signifigance of 4-2-1 VS 4-1. Is one better that the other? Is one better for low end torque and the other better for high end power? help a brother out.
 
you already figured it out, one's better for low end and the other is better for top. Both are better than stock manifold.
 
Originally posted by qwall
you already figured it out, one's better for low end and the other is better for top. Both are better than stock manifold.
Ain't that the truth... I pulled the manifold cover( you know the silver one) And I found a huge crack and a big ass hole I didn't even know I had( would have never known) But because I bought my header and was getting ready to install it I found it. So to the guys running stack manifolds for the time being pull the cover and check.:confused:
 
the cover is the heat shield. 4-2-1 is better for low end and 4-1 is for top end (as someone previously stated) i currently have 4-1 b/c i felt i had pretty good low end, after i installed it (it was after i hda my cat take n out too) i really felt it at around 3k hwere the revs would shoot up quicker, i like them n good luck on the install :thumb:
 
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