hey there guys what is the diffreence in the two styles
4-2-1 is for what power range?
4-1 is for what power range?
what are the pros and cons between the two?

thanks again for all your help and yes i did a search

 

that is a good question i would like to know also

 

4-1 gives the greatest gains at the high end with some expense at the bottom end. 4-2-1 gives good gains at the midrange. The 4-2-1 header generally does not have any clearance issues with the front crossmember. 4-1 headers sometimes have clearnace issues with the front crossmember and how low they sit. I would personally go with a 4-2-1 header if the car is just a daily driver. If your car lives in the upper rpm range get a 4-1. Just my 2 cents

 

thats what i thought but thanks for backin me up

 

 

So, here's my question: Why does it make any difference? I mean, I would think that 4-1 headers would give the greatest gains at all engine speeds simply because they offer the lowest restriction. I would think also that 4-2-1s seem better in the midrange only because power production gets choked off at high engine speed. Does anyone have any dyno plots showing the difference between the two? Sorry to ask such n00b questions, just wondering. Yes, I did a search, and it led me here.

 

Read this
http://www.team-integra.net/sections...sp?ArticleID=2

 

Sweeeet! Thanks man. Everyone should read that article.