Thread: Anyone notice a MPG increase from Magnaflow catback?
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Old 05-17-2010, 09:19 AM   #47
WildBillyT
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Quote:
Originally Posted by NastyEllEssWon View Post
youd think the six cylinders would get better mileage than the v8's damn gm
Yeah, and the milage went UP after a gear swap.
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