Thread: DIY - Spark Plug Indexing
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Old 05-12-2009, 10:11 PM   #33 (permalink)
hansj3
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Join Date: May 2009
Location: inver grove heights
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jeep - '96 jeep grand cherokee limited
90 day: 20.06 mpg (US)
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the 12a had a goofy 3 prong design that was almost flush with the thread ring
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