Saw on ebay for $199
http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMEWA%3AIT

 

The price is certainly right


Can someone educate me just a little about the pro's & cons of a 4-1 header like this one vs. a 4-2-1 header? All I can really remember is that one is better for torque and the other is better for top end. I think. A little help here?...

 

i think it was 4-1 was hp, 4-2-1 was torque..... but then again, its one or the other

 

Yes, but where & how much across the range of rpm?

 

i really dont thing it makes that much of a difference in either HP or tourqe, on our cars at least.

 

Really? Why not? A hunch I assume

 

i mean, look at the header.

with something like a V8, the difference between long tube, equal length or shorties is quite different.

with this, theres hardly a change bewteen 4-1 and 4-2-1

just an guess based on my experience with v8's in general

 

this is almost like the obx header, cept the obx header is even cheaper isn't it?

 

4-1 header = redline Hp
4-2-1 header = mid range torque

 

Think about a MINI engine as half a V8, headers do make a difference depending on configuration.
Motorcycles are a good example of a highly tuned engine that responds well to the proper configuration header.
It's all about scavenging exhast gas from the cylinders. Other elements involved are reversion and velocity this is a deep subject so why not research it?

 

This is a 4-1 and comes with a Cat or cat substitute and if it does produce additional hp it should be in the top end range. The OBX is 4-2-1 and does not come with a Cat and if it does produce additional hp should be in the lower/mid range.

Both for around 200.00 giving anyone two viable choices . For this kind of money its a worthy consideration for the enthusiast.

I have the OBX header and like what it did for the car. I started with the OBX header and 1-ball exhaust and felt that my mid range was stronger (i.e. pulled stronger). I have since added a cat back exhaust and feel that the range of "pull" has been broadened into the high rpm range. I also feel the car revs freer. All butt dyno of course, I'd post graghs but my butt doesn't have a usb port so I can't transfer the data.

For this kind of money, its worth doing - even if at then end of the day you just learn something. So I say header up!

 

Thanks for the comments guys


I'm looking at this header because for heck $200 including a cat can it work?
I think its crazy how many headers cost $700+
I mean yes it looks like a OBX header but this also comes with a CAT:smile: for the same money

Also I figured it would make my exhaust louder

 

That's a resonator they included in their kit. They say to use your own cat if you want/need to keep it.

 

4-2-1 seems to make the most sense.

the car could use more help in the midrange tourqe department rather than high end HP.

for what its worth, i know Dr Obnxs could probably back me up, with Mustangs,)ro just small Fords) the best all around header just happens to be the Tri-Y, a 4-2-1.

 

Hi,

there is NO CAT included, just a resonator .... Still Need a CAT, either stock one or an aftermarket ? one

 

[QUOTE=rednwhitecooper]4-2-1 seems to make the most sense.
the car could use more help in the midrange tourqe department rather than high end HP. QUOTE]

My thoughts parallel yours and for that reason I did the OBX header.

PS - thats a dink of a resonator.

 

Help me understand. Why would they include a resonator instead of a CAT? So would this mean that this would not simply replace the stock header?

 

I'm pretty sure that the 4-2-1 is all-around better, actually. Because the gas flows out of the head in a pulsatile fashion, the 4-2-1 allows better mixing with less turbulence, because it allows you to combine the pulse waves more evenly if you pair up ports so that one is flowing and the other is not. See my good friend Samurai Will's post in the Randy Webb exhaust thread:

https://www.northamericanmotoring.co...&postcount=241

A 4-2-1 should flow better at basically all rpms, I believe.

 

That is most definately not a CAT. They include it to make it 'look' like a CAT. That way, it can fool the visual inspection that some states require. It's not a street-legal replacement.