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Old 03-05-2004, 03:17 AM   #1
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Default Series II & Series III

What'* The difference between a Series II and a New Series III engine?
How did GM get another 20 horses out of it?
And why didn't GM put it into the SLE?
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Old 03-05-2004, 03:26 AM   #2
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I believe they used a more polished, and ported version of the M90. Also some slight intake and exhaust differences.
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Old 03-07-2004, 02:45 AM   #3
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Series III has an electronic throttle as well
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Old 03-07-2004, 02:52 AM   #4
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The Series III SC wouldn't be a bad idea for the SLE, but then who would pay the extra for 15 more ponies?
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Old 03-07-2004, 08:14 PM   #5
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did they put a metal intake on the series 3?
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