4-1 or 4-2-1
10-12-2005, 07:11 PM
#1
If you got em, burn em!
Thread Starter
Join Date: Aug 2005
Location: Ocala, Florida
Posts: 118
Likes: 0
Received 0 Likes
on
0 Posts
4-1 or 4-2-1
which is better for a d15b. i heard 4-2-1 had less back pressure so i may lose torque but if thats the case i think i have more tourque than normal anyways. so let me know which would overall be better.
10-12-2005, 09:24 PM
#2
89 CRX si, now with b16!
Join Date: Mar 2005
Location: Las Vegas, NV
Posts: 456
Likes: 0
Received 0 Likes
on
0 Posts
I heard that 4-1 headers are better for torque, while the 4-2-1 type is better for mid-high end power. For the d15, I would go with a 4-2-1 one piece header. That's just my 2 cents.
10-12-2005, 09:32 PM
#3
2 tone Rex
Join Date: Jan 2005
Location: Alexandria, LA
Posts: 755
Likes: 0
Received 0 Likes
on
0 Posts
I have a D15B VTEC with a Meagan 4-2-1 header, and love it... Performance and sound... I cant give any real before and after performance opinions because I installed it with my swap, so I never ran it stock... Personally, Id go with the 4-2-1...
10-13-2005, 09:54 AM
#4
Civilian
Face it, you'll never have much power in the low-mid range with a honda motor. It's all top end for the most part so a 4-1 is the way to go. You'll feel a difference once the engine winds up 
10-14-2005, 05:33 PM
#7
2 tone Rex
Join Date: Jan 2005
Location: Alexandria, LA
Posts: 755
Likes: 0
Received 0 Likes
on
0 Posts
To clarify the 4-1 vs 4-2-1 subject...
From DC Sport's web site:
http://www.dcsports.com/faq.asp?fid=26&sid=&tid=5
In other words, for race get 4-1, for every day street use, get 4-2-1... Course it is all about personal preference...
From DC Sport's web site:
What is the difference between a 4-1 header and a 4-2-1 header?
Answer
In many cases 4-1 headers are designed for racing applications where the vehicle is being driven at or near redline. The 4-1 design maximizes top end power, whereas the 4-2-1 evenly distributes it throughout the power band. There are cases where a 4-1 header works better than the 4-2-1 and in those cases we use this design.
Answer
In many cases 4-1 headers are designed for racing applications where the vehicle is being driven at or near redline. The 4-1 design maximizes top end power, whereas the 4-2-1 evenly distributes it throughout the power band. There are cases where a 4-1 header works better than the 4-2-1 and in those cases we use this design.
http://www.dcsports.com/faq.asp?fid=26&sid=&tid=5
In other words, for race get 4-1, for every day street use, get 4-2-1... Course it is all about personal preference...
h:
10-15-2005, 04:20 AM
#10
Member
Join Date: Sep 2005
Posts: 76
Likes: 0
Received 0 Likes
on
0 Posts
I was always under the impression that a 4-2-1 would be best since, when they join into 2, there is a slight amount of vaccuum created onto each of the 2, which allows one or the other to flow more freely... kinda hard to explain I guess. I don't have any "life experience" with headers on a d series either.