Thread: ? about spark plugs
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hobieboy hobieboy is offline
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Join Date: May 2002
Location: Up North
Posts: 1,449
Bosch & NGK uses different numbering scheme.

NGK plugs - smaller # is colder (7 is colder than 8).
Bosch is reversed.

I think a NGK BP8 range is similar to Bosch WR4 range.
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Old 02-16-2007, 08:11 AM
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