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Threads Tagged with rn12yc

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4, 4220, applications, bosch, bosh, champion, copper, cross, davison, harley, platinum, plugs, reference, rn12yc, spark

Champion RN12YC to Bosch Platinum+4 Cross Reference??

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Multi-page thread

1 2)

staged67gspwr on Sep 22, 2006

Jul 25, 2010 09:16 PM
by kc5vgw

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11

20,455

Ignition/Tuner/ECM/Fuel Injection

404, 4163, 4164s, 5000709, autolite, champion, davidson, harley, harleydavidsonautolitedistributor, hd, plugs, rn12yc, spark, standard

2 VERY basic Q's

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Multi-page thread

1 2 3)

HarleyX89 on May 6, 2009

May 7, 2009 12:38 PM
by Raptor1956

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26

2,758

auto, champion, colder, condition, harley, hotter, numbering, panhead, plug, plugs, rich, rn12yc, run, safely, sportster

rn12yc whats next hotter plug?

pirate4hire on Oct 13, 2007

Oct 15, 2007 08:49 AM
by mentor70

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5

9,382

Exhaust System Topics

colder, commpression, harley, high, plug, plugs, rn12yc, rn14yc, shovelhead, spark, versus

Whats the deal with these spark plugs?

staged67gspwr on Sep 21, 2006

Sep 27, 2006 01:25 AM
by staged67gspwr

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6

3,312

champion, colder, difference, engine, evo, harley, numbers, part, plugs, rn11yc4, rn12yc, spark, sparkplug

Spark Plug Help

Cman on Sep 21, 2005

Sep 21, 2005 07:15 PM
by HDF Tech

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1

1,841

Exhaust System Topics

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