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Old 09-23-2008, 03:03 PM
Arthur Dalton Arthur Dalton is offline
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Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,804
BC his Bosch Originals call a stock heat range of 9...which is a 5 in NGK.
What you run on a different engine set-up has nothing to do with his engines specifications on heat range.
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