4-2-1 vs 4-1 header

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#11

05-05-2007, 10:28 PM

Kedawei

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Join Date: Sep 2005

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Posts: 1,930

RE: 4-2-1 vs 4-1 header

I've seen many dynos for both.Most of the 4-1s I've seen out of Hondas make gains from 5k rpm upward, and most 4-2-1s I've seen make better midrange with less gains up top. You really won't see much difference between the two, a few hp here or there. I would get whatever is cheapest for a street car (Megan). The only real difference you'll see out of a header would be comparing a stock/Megan/DC Sports to a Bisimoto/DTR/RMF/etc.

#12

05-06-2007, 02:06 AM

Doug30

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Join Date: May 2007

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Posts: 142

RE: 4-2-1 vs 4-1 header

Thanks for all your replies, they have helped me with my question. But now they open up even more questions onto what I should get!!

#13

05-06-2007, 02:58 AM

mybrokenblinker

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Join Date: Aug 2006

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RE: 4-2-1 vs 4-1 header

Quote:

ORIGINAL: reaper2022

I meant to say that they were usually 2-piece or 1-piece, respectively. Either way, what does it matter how many pieces a header is? Everybody I've talked to agrees that it's easiest to just bolt a 2-piece together before installing it anyway.

Also, for the record, I was quoting an issue of Super Street (Super Street, October 2005, page 136) on the power ranges. If you don't think a 4-1 is better for mid-range, take it up with Roel at Super Street, who wrote the buyer's guide.

And 03, I appreciate the support, but he has the pictures right.

it's all good, just didn't want people to think that all 4-2-1 were two piece, and 4-1 were one piece. I myself have a 4-2-1 one piece.