what are the differences between these 2 types of headers?

 

well you know more about it than i do lol oh well if they hammer you gave me my answer thx

 

I second that...

 

4-1 = is good for more high end torque
4-2-1 = good for low end torque

 

perfect example

 

what rudy told you was also true. Just more technical.

 

Well.... the 4-1 doesnt always have to have the highest end HP. Companies are now making "Stepped" 4-2-1 headers (like Toda) that provide an increase throughout the entire powerband like the classic 4-2-1 header by using stepped tubing and keeping the primary/secondary's lengths long, while incorporating charecteristics of a 4-1 header (example: having the collector size large enough for peak horsepower gains equivalent to a 4-1) Just go with a hybrid-type 4-2-1 header yO


[Modified by ivanED9, 4:51 PM 7/1/2002]

 

SPOON 4-1 which is actually more of a 4-2-1 gets the best of both world and mad high end

can't wait to put mine on. still sitting in my closet awaiting testpipe and type one b-pipe

 

power aside, here's 2 other things to think about.

clearance: 4-1's have a much larger collector than a 4-2-1 and in turn, it hangs much lower. Pretty much everyone I know around here (NYC) who had a 4-1 has crushed the collector.

maintence: if you're removing the tranny, it's nice to be able to just remove the downpipe on a 4-2-1 instead of having to remove the entire header as you would with a 4-1. Cut's at least an hour off a clutch job.

 

SOUND. From my experience with DC 4-2-1 and DC 4-1, the 4-1 brings out the raspiness or tinniness (are these even words? hehe) from my exhaust. My Tanabe RM went from mean and low to a weed wacker on steroids. The 4-2-1 isn't as bad.

As for the power characteristics I would agree with whatever has been said in the above replies.

 

The importbuilders modded JG header is nice, still 4-2-1 but with a 2.5" collector.

 

danm.. really?? I just got a 4-1 installed a couple weeks ago and now a clutch is going in next week.. had of known, I would've waited and had both installed at the same time....

 

 

This is where I got mine

http://solar.innercite.com/comptech/header2.html

fortunately I didnt pay anywhere near that price!

 

http://www.importbuilders.com bolt on section, more power then hype r headers