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[Modified by Bryant, 10:19 PM 2/14/2003]

 

ITR headers on a B16A in a CRX require you to eliminate one of your O2 sensors by splicing one onto the other so you only use one O2 sensor. You have to extend the O2 wire to the cat inlet in which the bung for the O2 is. Also when applying JDM ITR headers on a CRX, you have to modify your crossmember by banging it in about 3 to 4 inches in to clear the downpipe, or you can buy a custom cross member from Z10 Engineering. This also works for Mugen headers and Spoon one piece headers. Ive applied it to my car and took me about 6 hours to do.

besides that point, any headers from any B series motor will fit on your car.

if you choose to retain the OEM upper portion of the headers, 95+ GSR downpipes bolt onto it with the exception you have to plug the bung for the O2 in the cat inlet.

-marty moose

 

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[Modified by Bryant, 10:20 PM 2/14/2003]

 

personally i would just have an exhaust shop relocate BOTH o2 sensors to their stock-like positions. any exhaust shop should be capable of adding the bungs to the header.
if you dont want to relocate BOTH, you could always just leave the stock bung on the ITR header and extend the wire for one of the o2 sensors, and add the second sensor where ever you thought was a good spot.

i've heard bad stories about the splicing o2 sensors together thing so i am still not sure on this method. i was told by someone who tried doing this a few times, that about 50% of the cars he did this to ran fine, and the other 50% ran like ***.

my .02 and hth,
Jason

 

i have one o2 sensor in my car and it runs fine it just depends if you do it right or not...and 2pc headers are easier to put on

 

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[Modified by Bryant, 10:20 PM 2/14/2003]

 

put BOTH of the o2 sensors on the headers where they are located on the stock manifold (take it to mieneke and have them weld 2 bungs) and get a plug and plug the hole near the cat. it will save you a lot of hassle. i also beleive that if you are talking about a jdm 1st gen b16 the oxygen sensors have to be a certain length from the ports to perform properly. also i had a del sol 4 into 1 dc header on my b16 and it was a pain in the ***. i had to slaughter the hell out of my crossmember to get them to fit and also the fact that along side the oil pan there are 4 pipes instead of 1 like the 421 design, i bottomed out that header on everything it was so flat on the bottom it was rediculous. so basically what i am saying is i would go with a 421 2 peice design, alot less hassle.


[Modified by internet ay, 5:43 AM 12/7/2001]

 

Honestly I'm going with the JDM ITR Header, or just the JG Pro-flo Header. http://www.intercrewautosalon.com

 

Well my CRX of all besides show is also used for track purposes. Because of my conversion from two O2's to one, I have had no problems. As in performance due to the positioning of the stock placement of the bungs on the upper portions, I have had no problems with this. My car runs like a champ. 13.9 on street tires with a full interior and system.

-moose

 

I've got a DC 4-1with a 1-O2 wire setup....

Granted, it would probably run a little better if it had 2 bungs, both in the stock locations...

But NO sjop near me wanted to even attempt to weld into Stainless steel, especuially as far up on the header as the stock ones are....

 

i was running one O2 and the car ran like ***...it would bog everytime it accelerated but sometimes if i would run WOT it would run fine so i pluged the O2 by the cat and welded in two new O2 bungs in the stock location and it ran like a champ...i also had to flip the O2 wires around at the ecu because it still did the same thing after i put the new bungs in...had to do that when i did the swap too...mat not be the same for others......hth

 

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[Modified by Bryant, 10:20 PM 2/14/2003]

 

So is a header even worth it? I mean you spend 300 or so on a header and then you have to rewire the O2 sensors and possibly modify the crossmember for how much hp? I have read that wiring the two O2 sensors into one makes the car run rich, or the cylinder pairs to run messed up. So you spend all that money and your car either runs rich or runs like ***. Wouldn't it be better to just port out your stock or something like that? I just don't see how spending $300 for a performance mod that actually makes your car run worse is worth it.

 

DC sports 4-2-1 ceramic coated for best low-mid area gains and reasonable price..

 

where did you here that wiring the two o2 sensors makes the car run rich?

 

heresay says JG flows too much.

 

generally dc is crap once you start adding internal mods and need a good flowing header. you can bust out with the jdm itr dc 4-1 with the 2.5" collector, which my friend has on his crx with b16. need a muffler shop to cut a big *** notch in your crossmember however. i suggest you have it reinforced at the same time. good header though, he only paid like $350 and had the bungs welded on.

 

iT SEEMS THAT WE HAVE THE SAME PROBLEM man, But, my other problem is my car wouldnt crank so I had to jump start my car.The car wouldnt even turn over.Would that be a possible starter problem.If you can help me out any further,that would be great. Thanx alot

Chino

 

Where did he have the bungs welded in? The jdm itr header is a 4-1 and the stock b16 manifold is a 4-2-1 and the 02 bungs are located where the primaries for cylinder pairs one and four and two and three meet. The 02 sensors monitor the cylinder pairs, so would welding one 02 bung in primary for cylinder one and one on the primary for cylinder three work for a 4-1 header? At least this way the 02 sensors would be monitoring one of the correct cylinders, so the ecu can run the cylinder pair with the right mixture. Am i correct here? I am wondering if this would work.


[Modified by Sirvtec, 2:23 AM 12/9/2001]

 

well you say my car would run better with two o2's given the proper placement.
on the actual dyno my setup runs better with only one o2.
every application is different.
MY self experience doing swaps one o2 instead of two doesnt make much difference. just gotta do it the right way.

 

i honestly dont think you'll notice a difference on the dyno no matter how much you **** up the O2 sensor wiring.. at WOT its most likely gonna be the same.

its gonna come into play at part throttle, i've got both of mine hooked up properly (stock exh. mani) and it runs perfectly at any throttle position, whereas a friend of mine screwed up the O2's and the car bogged horribly at anything but WOT.