4-2-1 or 4-1 dc header?
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Joined: Jul 2002
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From: New Albany, oh, usa
Re: 4-2-1 or 4-1 dc header? (steves98itr247)
I got it a while ago..... I cant even remmber now??????
does it make much of a difference over the stock one?
how about the AEM CAI... does that make much of a difference?
does it make much of a difference over the stock one?
how about the AEM CAI... does that make much of a difference?
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Honda-Tech Member
Joined: Jan 2002
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From: Orange County, CA
Re: 4-2-1 or 4-1 dc header? (steves98itr247)
anwayyz, i'm getting one this weekend, can't decided which one to get, i always thought 4-1 was better, but then.... it's cheaper than a 4-2-1...... i'm confused..... last i remember 4-2-1 has better low end and 4-1 has better top end? am i right?
Joined: Jan 2002
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From: West coast, USofA
Re: 4-2-1 or 4-1 dc header? (MugenGTR)
anwayyz, i'm getting one this weekend, can't decided which one to get, i always thought 4-1 was better, but then.... it's cheaper than a 4-2-1...... i'm confused..... last i remember 4-2-1 has better low end and 4-1 has better top end? am i right?
i've done all that all motor stuff.
Joined: Apr 2002
Posts: 1,248
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From: O.C., CA, USA
Re: 4-2-1 or 4-1 dc header? (R-1303)
That is correct. if you split the air flow with a 4-2-1 you will produce torque low end becuase of the restrictions.
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Honda-Tech Member
Joined: Jan 2002
Posts: 2,736
Likes: 2
From: Orange County, CA
Re: 4-2-1 or 4-1 dc header? (R-1303)
anwayyz, i'm getting one this weekend, can't decided which one to get, i always thought 4-1 was better, but then.... it's cheaper than a 4-2-1...... i'm confused..... last i remember 4-2-1 has better low end and 4-1 has better top end? am i right?
That is correct. if you split the air flow with a 4-2-1 you will produce torque low end becuase of the restrictions. But the 4-1 will pick up high end becuase of the design it will allow the air to flow freely and higher RPM's. For Itr's i would choose to build up my High end because that is where all our power is at with Vtech. But if you want all around performance get a Turbo! i've done all that all motor stuff.
That is correct. if you split the air flow with a 4-2-1 you will produce torque low end becuase of the restrictions. But the 4-1 will pick up high end becuase of the design it will allow the air to flow freely and higher RPM's. For Itr's i would choose to build up my High end because that is where all our power is at with Vtech. But if you want all around performance get a Turbo!
i've done all that all motor stuff.
btw stock b20 DOES NOT REV high, so would i benefit from a 4-1? or should i jus go torque wild w/ a 4-2-1 and NEVER get traction? haha, delimma........ 
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