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Old 01-17-2013, 09:18 AM   #1
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Header Install

This post is for informational use. If you plan to install a header here are some things I have ran across and may help when getting all the parts together before your install. I have the OBX Maximizer (1 7/8" runners and 2.5" collector) header installed on my 2012 sedan. Originally I had the upstream air fuel ratio sensor installed about 3" away from the head on only #4 cylinder and the downstream was in the collector. After about 100 miles the CEL came on with P0420 cat code and the engine is running VERY rich. After doing research and talking to my techs that work for me the upstream needs to read all 4 cylinders. I started looking for o2 extenders and could not find one for our cars. I found out that our upstream sensors are a 5 wire wide band air fuel ratio sensor and the wires CANNOT be extended doe to too much resistance. After looking around and being on the phone with my vendors I have found that there is a sensor that will work. It is used on the 2007 Porsche Boxter with the 2.7l. Bosch part #17276, Denso part #234-5108, Walker part #250-25015. These sensors are 850mm (about 33.4") and will reach down to the collector with ease. Now for the downstream sensor. It CAN be extended because it is only used to read the cat efficiency. You will need to use a spacer that comes out in a 90 degree for space and to trick the computer. the rear o2 sensor needs to be at least 2.5" or more behind the upstream sensor. I hope this helps.


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Old 01-17-2013, 09:39 AM   #2
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Any idea if we'd have luck with an MIL eliminator on the downstream?
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Old 01-17-2013, 09:58 AM   #3
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I have not looked into it. I'm not a fan of using electrical components. I'm really waiting for a tune. I have no doubt that our cars can put 200HP to the ground with a tuner.
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Old 01-17-2013, 10:08 AM   #4
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I went through a similar process with my FSwerks header. I had an 02 sensor bung welded on at the collector angled at 45 degrees. Been flawless so far!
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Old 01-17-2013, 06:48 PM   #5
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How do you guys like your headers, sound and performance?
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Old 01-17-2013, 08:16 PM   #6
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I went through a similar process with my FSwerks header. I had an 02 sensor bung welded on at the collector angled at 45 degrees. Been flawless so far!
What did you do about the sensor wire length in your application?
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Old 01-19-2013, 02:25 PM   #7
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What did you do about the sensor wire length in your application?
It is used on the 2007 Porsche Boxter with the 2.7l. Bosch part #17276, Denso part #234-5108, Walker part #250-25015.
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Old 01-21-2013, 07:39 PM   #8
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Done. Ordered.
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Old 01-21-2013, 08:03 PM   #9
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Quote:
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How do you guys like your headers, sound and performance?
Quote:
Originally Posted by TORQUERULES View Post
What did you do about the sensor wire length in your application?
The header may sound a bit ricey until you get a full blown exhaust system on there, but I don't mind it. I think it sounds pretty good from inside the car lol.

And as far as cable length, it comes with an extension cable from FSwerks, IIRC. If you're doing the install yourself, MAKE SURE TO ZIP TIE IT AWAY FROM HOT SURFACES!!!! When i had the mechanic install mine, They left it resting on the header. When I hooked up my ECU tuner, I couldn't figure out why I couldn't get a reading off of it... It had melted the wire nearly in half, and that extension cable is like 75 friggin bucks from FSwerks.
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Old 01-21-2013, 08:21 PM   #10
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Did my F2 install and Had no issues or CEL light so far, they just plugged one of the O2 ports.


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