got a 00 civic. want to replace headers. which one is better, 4-2-1, or 4-1. im prob. gonna go with the 4-2-1. is there any horsepower difference?

 

both types will give u a good amount of midrange and low end, but, the 4-1 will yield better numbers in topend.............

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dead x leg &raquo;</TD></TR><TR><TD CLASS="quote">want to replace headers. </TD></TR></TABLE>

damn, I only have one header on my honda. 4-1

 

A 4-1 will improve top end, whereas a 4-2-1 will improve midrange.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IHateJDM &raquo;</TD></TR><TR><TD CLASS="quote">damn, I only have one header on my honda. 4-1
</TD></TR></TABLE>

LOL, ***

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wutupnut &raquo;</TD></TR><TR><TD CLASS="quote">

LOL, *** </TD></TR></TABLE>

yeah, I know, I am an *** . he's a noob though, it's better he learns now than later.

 

4-2-1 help the mid range out

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98JRSChatch &raquo;</TD></TR><TR><TD CLASS="quote">4-2-1 help the mid range out </TD></TR></TABLE>

2nd that too!

 

i've never had 4-1's but my friend told me he felt hella difference with his, i drove it and could feel a good diff. 4-1 gets my vote

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IHateJDM &raquo;</TD></TR><TR><TD CLASS="quote">yeah, I know, I am an *** . he's a noob though, it's better he learns now than later. </TD></TR></TABLE>

True, atleast you let him down easy, unlike most would have done. Anyways back to the question, it just depends where you looking for gains, midrange or top end. My vote also goes for a 4-1

 

4-1 for the drag racers, 4-2-1 for the auto-x'ers. just personal preference on where you want to gain power.