I was going to buy a header and i was wandering which would be bettter a 4:2:1 or a 4:1. Any advice very apreciated.

 

Any one?

 

are any name brands better than others?

 

this isnt for my y8. its for a N/A z6.

 

there is a red search link at the top right, this has been covered hundreds of times.

as far as brands go, you get what you pay for.

the 4-2-1 i believe creates better top end, while the 4-1 creates better low end.

im not 100% sure on that tho. but its covered with the red search link at the top right

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92ehatch &raquo;</TD></TR><TR><TD CLASS="quote">there is a red search link at the top right, this has been covered hundreds of times.

as far as brands go, you get what you pay for.

the 4-2-1 i believe creates better top end, while the 4-1 creates better low end

im not 100% sure on that tho. but its covered with the red search link at the top right</TD></TR></TABLE>

lol sounds like you should be using the search too.

In general 4-1 is better for top end and 4-2-1 is better midrange. But also the design of the header makes a difference

<U>Things to consider</U>

You'll never really gain a strong midrange. So making a very strong top end is better in my opinion. Plus when racing the revs are usually in the upper rpms any way

Also depends on what kind of header. If you're looking into a DC header. Get their 4-1 as opposed to 4-2-1. But for example in the B-series world a SMSP 4-2-1 will romp all over a DC 4-1 throughout the entire powerband.

I don't know of any big companies really that make good SOHC headers though.

 

it depends on the header because there are a bunch of 4-2-1 headers that will provide better gains all over the power band compared to a 4-1 header.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SkoundrelUSA &raquo;</TD></TR><TR><TD CLASS="quote">
I don't know of any big companies really that make good SOHC headers though.</TD></TR></TABLE>

you just said it, smsp

 

kamikaze 4-1

 

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

you just said it, smsp </TD></TR></TABLE>

Yeah I wasn't sure if they actually went into production though. I know Dave made a prototype one but I wasn't sure if its in production.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by swap_killer7079 &raquo;</TD></TR><TR><TD CLASS="quote">are any name brands better than others?</TD></TR></TABLE>

SMSP

http://SMS-Products.com

 

bisi moto makes the best sohc header in my opinion, he's like the smsp of single cam headers

 

yeah ive heard that bisi moto is the ****. pricey but makes good numbers supposedly. Sweet *** header design too

 

4-1, honda tunning mag. did a test on the differt styles of headers comparing them and the 4-1 was just a little better. Like 1-2 horse so if the 4-2-1 are alot cheaper go with them because you wont notice 2 horse. But the 4-1 is the better header

 

this thread is over 2 years old, why are we replying to it ?

 

lol