Thread: Anyone notice a MPG increase from Magnaflow catback?
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Old 05-17-2010, 09:04 AM   #46
NastyEllEssWon
 
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Quote:
Originally Posted by Mark42 View Post
the fuel economy is now 27.45 average compared to a best average of 26 when the car was bought last summer.


youd think the six cylinders would get better mileage than the v8's damn gm
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