Well I have been shopping for a header for awhile and I thought I had made up my mind to order a Greddy 4-2-1 stainless header. I like that it is stainless. I like that 4-2-1 should increase low end for daily driving. I like that I found it for $300 shipped when MSRP is $389.

Anyway, I was planning to make my purchase tomarrow but I have been doing some more research and now I am starting to get cold feet. When I search for "greddy header" I get alot of posts to read. Sorry to add to the list .

So in one post someone pointed out that the stock gsr header is 4-2-1 with a 2" collector, so buying an after market 4-2-1 header with a 2" collector would be a waste of money and yeild little to no power gains. Is this correct? In this post redGSR pointed out that it made a decent power gain:
http://www.gs-r.com/phpBB2/vie...eader

Although I am not sure if there is a 4-1 header in that test. Also, this link shows that most 4-2-1 headers of various brand names have a 2" collector:
http://www.team-integra.net/se...D=794

Is this to say that none of these headers make decent power gains because they all have a 2" collectors?

Basically I am confused and seeking guidance so that I can purchase the best header for my set up. I have an '01 gsr with an aem sri. After I get a header I plan to add a hi-flow cat and a cat back, both probably in the 2.25" diameter range. Eventually I will do some other minor mods but I will most likely never go with cams or pistons or anything drastic. Until now I thought that a 4-2-1 would increase my low and mid range, yeild a decent overall power gain, and only gain 1-2hp less than a 4-1 in the top end/overall.

But, if there is no gain to be had with the Greddy 4-2-1 w/2" collector, I will go with a 4-1 rather than waste my money.

Please help, JFoster

 

If you want a pretty good header (not the best by far) and you dont want to pay DTR, SMSP, Hytech prices(well worth it BTW) then i would do with the ITR JDM 4-1
the can be found for a good price and are far superior to the stock GSR manifold.
I have a customer that just put it on his car along with a JDM ITR cat and it is a really nice set up.

JM2cents......if you need any help just hit me up!!!

 

Thanks for the reply. I am not opposed to getting a 4-1 as long as it does not pose a ground clearance issue as I plan to add H&R sport springs soon.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jfoster &raquo;</TD></TR><TR><TD CLASS="quote">I plan to add H&R sport springs soon.</TD></TR></TABLE>
i am planning on that too...but i cna't decided if i wanna scrape every time i go up a ramp

 

I believe the other 4-2-1 piece that does produce gains is the comptech header.

 

That would be nice if it was not 3 times as much as the greddy.

http://www.groupbuycenter.com/buy.aspx?id=12960

Is the dc sport JDM header good? Would it give me ground clearance problems?

 

i have the comptech 4-2-1 and it's a wonderful piece. well worth the money, and the quality is great.

 

I have a jdm 421 headers and it's works pretty darn good! So I would suggest keep shopping around till you find the headers that you want to buy and great deal not all shops sells the same price. some r high and some are cheap!! It's all about taking the time to shop around!!

 

Correct me if I am wrong but aren't JDM type r headers 4-1? Which puts me back to the ground clearance issue.

I think I am just going to get the greddy header and try to like the high points (mostly that it is stainless and affordable).

Then I can put the over $600 I save by not getting the comptech toward a nitrous set up. I have thought about nitrous before but it worries me that it will kill my motor. I plan to put about 40,000 miles on this car(has 20,000 now) before I sell it and I don't want to let my power cravings cause problems. I will have to research that idea further. If you know of any good nitrous info please don't be shy.

Also, I am still open for suggestions on the header situation. Thanks for the input, JFoster

 

What about a kamakaze header from here?
http://www.importparts.com/

The buyers guide says they are 4-1 w/2.5" collector.
http://www.team-integra.net/se...D=797
But it also says for super charged applications, does that matter?
They are only $255 for a chrome one.

 

Get the JDM ITR 4-1 header, its not too expensive, it makes good power, and its OEM quality. Ive got one, and my car is pretty low, and its never scraped.

 

buy mine, buy mine With the IB mod, it makes 11 hp over the JDM type-r...

 

Can't help but jump in with my Toda Header 4-2-1. (800 or best offer, that price includes shipping). One of the best headers on the market.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jfoster &raquo;</TD></TR><TR><TD CLASS="quote">That would be nice if it was not 3 times as much as the greddy.
</TD></TR></TABLE>

Try this link http://www.imotorgear.com/dept...50201

That link you posted was for the race header. $490 for Tig weld and $390 for Mig weld. I'm sure other places have 'em for similar prices.

 

Well I was really interested in b18c4door's header, but as my luck would have it some one else bought it in like the last 10 min. Sorry patdemps, thats a great header but I can't spend that much $$$. If anyone else is selling a good header at a good price please speak up. Especially if your near MO.

 

someone else was selling the non-stainless version in classifieds, do a search!

 

Thanks for the link tub_sephiroth, but the team integra buyers guide

http://www.team-integra.net/se...D=794

shows that only the comptech race header has a 2.5" collector, and the ones you pointed out along with the greddy I was planning to get only have a 2" collector. And I am under the impression that only a header with a larger than 2" (stock size) collector will put out a decent power gain.

 

That I will, but I bet they are to far away to meet in person.

 

Problem solved. I guess. I hope. Five and a half for a mint JUN. It is not on yet as I have to get the gaskets. I guess I'll have the exhaust shop make me a reducer style test pipe for now so that it will mate up to the stock cat back. Just untill I can figure out what I am going to do for a 2.5" cat back. I really like the thermal stealth but I don't really want to spend another $450-500 to get it. I would let the exhaust shop put on 2.5" piping, at least for awhile, if I could find a quiet high flow muffler to put on it. Thermal doesn't make a universal of their stealth muffler, Apexi doesn't make one from their world sport, and RSR doesn't make one either. Whats the deal? Does anyone make a quiet, yet high flow muffler?

 

I suggest you wait till, you get a Carsound cat, and Exhaust to match up with your header.

Since you read some of the articles in TI, you'll know that putting a smaller diameter cat and exhaust will just choke off all the power you made with the header.

And to answer your first question, there was nothing wrong with Greddy headers, just as good as any other header in a 2" collector, 4-2-1 configuration, non-stepped, and stainless. And tuning will always optimize power from your parts.

ALso you may want to check here for your exhaust questions: http://www.team-integra.net/se...how=1

 

Thanks for the reply and the link mey_xanny. I am going to wait to install the header until I can get everything else. Especially since the gaskets are special order from Auto Zone, I might as well order the cat and muffler at the same time. I just don't know where to find a muffler that I would be happy with. I thought I wanted the thermal stealth cat-back but I found on the TI.net buyers guide that it is only 2.25" and I want 2.5" to match my header/cat. So I really need help finding a good muffler. I would love to find it asap so I could order it tomorrow or the next day. I want this exhaust to go on next week end if at all possible. So if anyone has or knows of a muffler that meets the following criteria please share:

It must have a 2.5" inlet/outlet.
It should have increased flow over stock.
It should not be loud.

I want my car to either be quiet like almost stock, or have a deep low quiet but powerful sound like a porsche. Not at all like a weed eater/lawn mower/dirt bike/chian saw/bumble bee/or any of the other all too common exhuast notes imports have. I am only looking for a muffler since cat-backs are too expensive. It will be accompanied by my Jun 4-2-1 header w/2.5" collector, a carsound 2.5" cat, and muffler shop 2.5" piping. Any help is appreciated. Thanks, James

 

i Recommend the DC Sports JDM header which has the 2.5 outlet

http://www.mmrusa.com/DCjdm.htm

 

I recommend a Jun 4-2-1 stainless steel header with a 2.5" collector. What muffler do you recommend? Quiet muffler with 2.5" inlet/outlet that is.

 

jfoster

This may perhaps help you.

the ES Oval from what I've heard was relatively quite, and an excellent design.

http://www.jdmhondaparts.com/frameset.htm

Magnaflow offers quite a variety too, some say 2.25 inlet, but the passage is 2.5, so some fabrication may be needed.

http://www.magnaflow.com/02pro...s.htm

Also if your gonna build your own exhaust I would recommend getting the mandrel-bend pipes from Magnaflow, and have the muffler shop weld it for you.

Also a resonator upstream from the muffler will suppress some sound.

But as you already know there are 2.5 inch cat backs out there if you were willing to shell the extra $100-$200 for a complete kit.

 

Thank you mey_xanng. That ES may end up being what I get. I hate that you pretty much have no idea what it will soud like untill it is on. Every muffler ad should be accompanied by a sound clip. Also I am checking prices on mandrel bent piping. I would by a cat back if it was quiet and 2.5". Which would be the hytech which I can't afford.