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Old 05-08-2011, 10:19 PM   #55 (permalink)
EcoModding Lurker
Join Date: May 2011
Location: Canada
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I think that all of the people who discredit mods which increase horsepower are kind of missing the point. I changed my exhaust over to a stock style dual exhaust layout on my 95 Crown Vic, which was something like a 15 hp gain over single, and my average mpg went up by about 3. In my experience, if you have more power on tap but you drive exactly the same as before then you WILL increase mpg.

Also, I know how most people feel about doing so but I had a 1981 Chev Malibu and I cut out the catalytic converter (which wasn't plugged!) and I got an increase of about 4 mpg, not to mention how much peppier the car felt.
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