Header question?
02-23-2017
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Header question?
Can anyone please tell me why some of the aftermarket exhaust manifolds for the d17a2 vtec, have a sensor hole in the header? My car is a 2004 civic si 4-door Canadian version equivalent to the ex model elsewhere. I have a magnaflow catback installed, my downpipe rusted out at the flange after my cat so I just ordered a magnaflow cat/downpipe and want to do the header at the same time. The stock down pipe as well as the magnaflow have 2 holes for the 02 sensors so that seems straight forward, just the aftermarket header for some reason have the extra 02 hole
02-24-2017
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Re: Header question?
Because the D17A1 has an integrated cat/exhaust mani, and the upstream sensor is located shortly after the head. Some of the headers you're looking at are probably designed as a "universal" D17 fit, if you will. Likely those are made just to look shiny as opposed to any performance gains.
02-24-2017
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If you think a good mechanic is expensive, try hiring a bad one
Re: Header question?
just the aftermarket header for some reason have the extra 02 hole
02-24-2017
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Sounds like those are D17A1 headers you are looking at. I did my EX header D17A2 with a DC Sports Ceramic Header. No holes for o2 sensor there on a D17A2 EX 2002 model. For pics visit my garage.
Last edited by SammySC; 02-24-2017 at 10:13 PM.
02-24-2017
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Rep Power: 122 Re: Header question?
Because the D17A1 has an integrated cat/exhaust mani, and the upstream sensor is located shortly after the head. Some of the headers you're looking at are probably designed as a "universal" D17 fit, if you will. Likely those are made just to look shiny as opposed to any performance gains.
02-28-2017
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Opinions on the obx header for the d17a2? This header has no bung for a 02 sensor. I live in Canada and to ship a header up here from California I'm being quoted between $65-$75usd for shipping alone. Any Canadian members here know a good place to buy one in Canada?
Last edited by Canadiancivicsi; 02-28-2017 at 03:22 AM.
03-01-2017
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I know of a good place in Toronto but I have no clue about Ottawa. Any local car groups you can ask where they get their parts? Or any friends that modify cars?
03-03-2017
#10
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Re: Header question?
It makes more sense to tool to fabricate 1 header form that fits two heads than to create two header types. Better for cost, less people returning item because they bought the wrong one.
