Thread: Does anyone notice their gas mileage decrease with the new muffler?
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Old Jun 16, 2008 | 04:23 PM
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DrMike
Joined: Nov 2007
Posts: 120
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From: Gatineau, Canada
Red face Re: Does anyone notice their gas milage decrease with the new muffler?
Originally Posted by banej
Yesterday I put in a new muffler Magnaflow 12158 and it sound great. The only problem is I think it spends more gas now. Does anyone notice their gas milage go down after installing a new muffler? This would suck especially now with the gas priced right below $5 a gallon.
Any pics after install, under car, I want to keep stock tips
 
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