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Trailing/Leading Spark Plugs?

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Old Nov 7, 2003 | 07:31 PM
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bighead
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Trailing/Leading Spark Plugs?
I have just found a total of eight spark plugs for the 13B, and they're all mixed up. Does anyone know how to tell the difference between the trailing (upper) and leading (lower) spark plugs?

THANKS!
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Old Nov 7, 2003 | 07:32 PM
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slipperywhenboosting
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8?? ...well, the Trailing plugs have a "T" marking on them, and the leading have a "L" on them...im not sure if this helps or not.
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Old Nov 7, 2003 | 07:32 PM
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Scott 89t2
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the will have an L and T on them somewhere.

otherwise the trailing will have a 9 in the part number. and the leading will be the same # except it'll have a 7 instead.
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Old Nov 7, 2003 | 08:23 PM
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RunningDeer
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From: Racing Bear's Tepee
The NGK 9- trailing has 2-blue bands at ends, 7-Leading is all white.
Last edited by RunningDeer; Nov 7, 2003 at 08:26 PM.
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Old Nov 8, 2003 | 02:22 AM
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Wow! This all helps very much! Thanks!
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