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Message: <blockquote data-quote="Ferendon" data-source="post: 3216986" data-attributes="member: 578259"><p>Contrary to what appears to be popular belief, modifiying a car for performance purposes, will quite often improve efficiency. If a simple bolt-on worsens your economy ratings, then you lost some power. When a car makes more power, the engine is under less stress at cruising speeds, and is usually at a lower RPM. The threshold at which, this usually changes, is when you have to modify the fuel system. By modifying the fuel system, I mean making the AFR richer to support modifications. A good intake system, a decent exhaust, and some good plugs/wires should help wake the car up a little, and actually improve mileage, as long as you drive like a civilized human being.</p></blockquote><p></p>

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