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Discussion Starter #1
I installed a Magnaflow catback exhaust system yesterday but I have not yet reset the computer by disconnecting the battery. Going by the mileage computer it looks like I'm getting 1 or 2 more mpg. So my question is should I reset the computer ? I don't want to lose this mpg gain.
 

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You should reset the computer so that it will learn the new breathing ability of the new exhaust. If you are getting better MPG (and you should a bit) you will not lose it by resetting the computer.
 
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