spark plug cross reference

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spark plug cross reference #747274 07/13/10 09:41 AM 07/13/10 09:41 AM
Joined: Mar 2008 Posts: 724 PA USA F flatiron OP super stock
flatiron OP super stock F Joined: Mar 2008 Posts: 724 PA USA	Trying to cross reference plugs and it's not going well. I am currently running a champion RN11YC4 and we feel it's to hot of a plug and I'm looking at Autolite's 403 or a AR-51. Are these 5/8 plugs and were are they as far as heat range goes when compared to what I'm running?

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Subject	Posted By	Posted
spark plug cross reference	flatiron	07/13/10 01:41 PM
Re: spark plug cross reference	MR_P_BODY	07/13/10 02:11 PM
Re: spark plug cross reference	Chris2581	07/13/10 06:15 PM

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