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Old 07-14-2008, 06:29 PM   #2 (permalink)
EcoModding Lurker
Join Date: May 2008
Location: North Jersey
Posts: 30

White 07 Civic - '07 Honda Civic LX
90 day: 38.87 mpg (US)
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Some exhaust systems have two cats to meet california emissions standards. Deleting one of those cats can have positive fe implications. A freind of mine just did just that on a mazda speed 6. I guess regulation of emissions went out the window when he moved to KY.
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