Thread: Electric Exhaust Cutouts? [and other efficiency mods]
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Old 08-11-2014, 06:02 PM   #2 (permalink)
Frank Lee
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Join Date: Jan 2008
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Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

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The only exhaust modification that helps fuel economy is when the cat and mufflers are deleted and the outlet is routed into the cab via a hole in the floor.
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