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Just installed a 4-1 header in my 04 civic sedan (dont laugh - its a work in progress - going to be full na) anyways the header is hella loud and runs thru a full cat-back magnaflow exhaust. I now NEED to install a air/fuel ratio gauge to make sure im not running lean and i wanted to know if the 04 civi's are wideband - which i have heard - which means i need a wideband sensor? Any input would help! thanks

 
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or is it narrowband? -Whichever it is I just wanna know if anyone else has done this and has any input

 
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Since you have a wideband already, why would you need another? You just need to wire up an AFR gauge to your current sensor. Boilermaker1 did a DIY on this a long time ago. If you search for it, you'll find it.

 
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^ exactly what i was thinking

 
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so i can piggy-back my stock sensors - And just wire the gauge up? but wont that cause a CEL to pop up?

im looking for the DIY as we speak

 
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https://www.civicforums.com/forums/7...uel-gauge.html


got it

haha but anyways, thanks - il def. not diy'n this haha i want the thing to read correctly