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Mustang Forums
2011-2014 Mustangs
Exhaust
Switching to an O/R X-pipe
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<blockquote data-quote="fuelforfire87" data-source="post: 15771938" data-attributes="member: 172024"><p>Yes the rear o2 sensors are narrow band and have nothing to do with measuring the AFR. The front o2 sensors do that. Like Gruca said the rears just check to see if the cats are working. Honestly I would wait till the x-pipe is installed and then flash the new tune, so you won’t get any CELs. If you drive with the x pipe installed before the new tune, it won’t be the end of the world, but you will get a CEL and they car may run a bit rough. Just make sure not to beat on it if you do that.</p></blockquote><p></p>
[QUOTE="fuelforfire87, post: 15771938, member: 172024"] Yes the rear o2 sensors are narrow band and have nothing to do with measuring the AFR. The front o2 sensors do that. Like Gruca said the rears just check to see if the cats are working. Honestly I would wait till the x-pipe is installed and then flash the new tune, so you won’t get any CELs. If you drive with the x pipe installed before the new tune, it won’t be the end of the world, but you will get a CEL and they car may run a bit rough. Just make sure not to beat on it if you do that. [/QUOTE]
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2011-2014 Mustangs
Exhaust
Switching to an O/R X-pipe
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