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Spark plugs #994908 05/18/11 01:41 PM 05/18/11 01:41 PM
Joined: Feb 2009 Posts: 1,274 Ontario.Canada C can.al OP pro stock
can.al OP pro stock C Joined: Feb 2009 Posts: 1,274 Ontario.Canada	..the old stand by for an early 340 was N9Y. ..so how does RN9Y differ and what effect do these resistor (?) plugs have on an engines' performance?

Re: Spark plugs [Re: can.al] #994909 05/18/11 02:21 PM 05/18/11 02:21 PM
Joined: Jan 2003 Posts: 74,942 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,942 U.S.S.A.	It has a resistor , you should be happy you can even get the correct heat range plug assuming the engine is stock .

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