Stock midpipe on a car tuned for an O/R midpipe

jaehow23

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Jul 25, 2011
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Sacramento CA
Guys, quick question...

If a vehicle is tuned to have an O/R midpipe on it (all monitors left on in the tune) would putting the stock midpipe on it make it throw a code? Or would it just run bad for however long the stock pipe was on? I'm asking because CA smog will have to do a visual check and the vehicle has to have cats on it. If anyone knows, please respond.

Thanks.
 

cj428mach

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Sep 21, 2012
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Kansas
Its not going to effect how the car runs so it'll be fine. Id just stay out of boost as you'll more than likely see an increase in it thanks to the smaller piping and cats.
 

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