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Old 01-14-2009, 05:00 PM   #20 (permalink)
ModelE
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Join Date: Oct 2008
Location: Boston, Ma.
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sabre - '02 Buick LeSabre Custom
90 day: 23.45 mpg (US)

frontier - '04 Nissan Frontier XE
90 day: 18.97 mpg (US)
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yeah i didnt expect any FE gain from just the muffler, but what about an entire new exhaust system... like from the headers back.? or is it again with the, if any, "immeasureable" gains if there are any and the definite debate in regards to there being gains at all.
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