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Old 03-20-2003, 06:41 PM
manny manny is offline
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Join Date: Feb 2003
Location: Ontario, Canada
Posts: 3,160
Actually, a well designed engine, with dual-wall exhaust manifolds and close-coupled catalytic converters doesn't need an airpump.
All of these items improve coldstart emissions i.e. converter warm-up enough, to eliminate the need for it.
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