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Old 05-10-2007, 06:49 PM   #1
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finally headers with 4 O2 and cats

This would be the perfect headers.....
This is cargraphic's 2005-07 headers.
Now someone needs to make these for the 3.2, 2001-2004


Che can you make this?

James

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Old 05-10-2007, 06:51 PM   #2
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Those are beautiful. Unfortunately, those are way more than $500....

Patrick
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Old 05-10-2007, 06:55 PM   #3
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3500$

But do you think we can convince Che to clone these and make it fit 2000-04?
James
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Old 05-10-2007, 07:05 PM   #4
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IF Che can get high quality, high flow cats and copy these well so there are no fitment issues, I"d be very interested.

Patrick
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Old 05-10-2007, 07:21 PM   #5
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Good question, why can't an exhaust manufacturer make a 2 bung header for 00-04 986!
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Old 05-10-2007, 09:50 PM   #6
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Che-

+1 for the 4 bung o2 header. That is one of the main reasons I've been holding back after reading the threads.

Jeff
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Old 05-11-2007, 07:01 AM   #7
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Fabspeed makes them for your car. Looks exactly like the Cargraphics. Take a look at the product video on their website. Cost $2,295

http://www.fabspeed.com/Boxster.html

Take a look at their video called " Boxster 986 Maxflo Muffler Explanation" it goes over the whole system from Headers with Sport/Cats to the muffler.
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Old 05-11-2007, 09:17 AM   #8
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Here is the header for 00-04 boxsters. It appears to have only one bung which is located before the cat. It needs a bung after the cat like the stock manifold. Where would the other 02 sensors go otherwise?
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Old 05-11-2007, 09:35 AM   #9
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Here's a pic of the fabspeeds maxflo exhaust for 97-04 boxsters. I noticed it has a bung down near the muffler/cat where the 2.5L car originally had one located and one way upstream. How would this work on a 00-04? You'd need an extension cord for your o2 sensors to reach that far back by the muffler no?
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Last edited by Adam; 05-11-2007 at 03:05 PM.
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Old 05-11-2007, 11:28 AM   #10
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Adam,
Yes you would have to lengthen the stock wire. Now here's the problem, I have cat bypass pipes, so no second cat is on my car.

Next and a bigger problem, I have been told by porsche that when you lengthen the wires, you cause an increase in electral resistance, due to the added wire, this will translate into an altered signal to the computer. This may trip a CEL, the computer is looking for gas concentration closer to the headers and without the increased electrical resistance in the wire.

Fab speeds would be ok, but are you going to drill 3000$ of headers and hope that it works, what if it does not , you cant return them.

Somebody here must work for a manufacturing faclity that can make them.
James
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Old 05-11-2007, 03:12 PM   #11
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Why don't they make a bung just fore and aft of the cat like the stock setup so you wouldn't have to worry about adding wire and other hassles? I assume there is a good explanation but I can't come up with any.
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Old 05-11-2007, 07:05 PM   #12
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I just watched the second video on the fabspeed site...

Boxster 986 Maxflo Muffler Explanation Video.wmv

well this video shows a version of headers that have 2 O2 bungs per header... for the 2000-2004 986.
So finally they are here. Forget cargraphic and this is what I am going to do.

Che's muffler
Fabspeed elbow tubes
Fabspeed bypass pipes
Fabspeed 2 bung O2 with cats headers.

They post some impressive dyno results.

James
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Old 05-11-2007, 08:15 PM   #13
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Good catch. I didn't see that second video at first and you can't see the second set of bungs in the picture provided. The headers DO have fore and aft 02 bungs. This does look like the real deal. The dyno sheet showed almost a 20 peak gain at the wheels and also gains accross the board. They also look quality made. I think I might put this system on my wish list now I still have a few questions. If the headers have the bungs why does it look like there is one dowstream by the muffler? Perhaps the maxlfow picture is a system for a 2.5L? I sent an email to fabspeed with a link to this thread. Hopefully they can provide more info.
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Last edited by Adam; 05-12-2007 at 03:33 AM.
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Old 05-12-2007, 04:21 AM   #14
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That's what I was trying to tell you guys in my first post. If you actually watch the second video that I specified by title you would have seen them point out that the O2 sensor bungs are in OEM locations. Fabspeed makes a great product. As for their customer service follow up that's a whole another story. You are better off calling them than expecting and email response.
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Old 05-12-2007, 06:48 PM   #15
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Thanks Socal. I didn't watch the second vid which explains a lot more. I took a look at che's 00-04 headers and they don't have a high flow cat or a second set of bungs. Looks like a CEL nightmare. What are we suppossed to do with our second set of 02 sensors Che?
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Last edited by Adam; 05-12-2007 at 06:51 PM.
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Old 05-13-2007, 07:18 PM   #16
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Hit the nail on the head. The DME is going to be really pissed off if it doent get a signal from the second set of O2s showing effiicient catalyst performance.

Now, I do wonder if "O2 simulators" could be used for the latter set of O2s to make the DME think all is fine and dandy. A lot of the guys with big power rice burners (Turbo's Zs, Subaru WRXs and STIs, Mitsubishi EVOs, etc) go this route and it seems to work, so I wonder if it could apply here?

Patrick
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Old 05-14-2007, 05:41 AM   #17
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My 2000 Boxster S has the "warm-up pre-cats" at the headers and then a second set of Cats closer to the muffler. According to FabSpeed the secondary Cats near the muffler are "Deleteable" and when you use their 2ndary Cat by-pass pipes to eliminate them you will have no problem passing emissions inspection and no CEL. I have to call them and ask what you are supposed to do with the O2 sensors and wires that attach to the 2ndary CATs.
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Old 05-14-2007, 06:03 AM   #18
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I have deleted the secondary cats without a problem to the O2 sensor on my car, and I believe your as well, has all O2 sendors on the headers before and after the primary cat.

The bypass pipes are cool, neat sound and maybe a little more power.
James
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Last edited by jhandy; 05-14-2007 at 12:56 PM.
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Old 05-14-2007, 12:33 PM   #19
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I have the cat back bypass pipes from fabspeed they are great. No cel at all havn't gone for smog check yet I have a bud that does smogs they turn away most Boxsters cause they cant access the engine so when its smog time visual shouldnt be a prob. The o2 sensors are in the front cats no worries. I would recommend the bypass pipes the exhaust sounds so much better and there is some performance gain at least I can feel a difference.

Next are the headers from fabspeed. I had to have my manifolds welded up already I guess its common for them to crack. Anyway it was alot cheaper to have them welded then get new ones 2500 is alot of bucks.

Last edited by Joe T; 05-14-2007 at 12:38 PM.
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Old 05-15-2007, 09:57 PM   #20
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Custom Exhaust

Hey! guys, im thinking about getting a custom exhaust made for my 2000 boxster, what do you guys think about this idea? thanks

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