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Which Auto-lite spark plugs?

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Old Oct 29, 2003 | 02:51 PM
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ws6rufus
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Default Which Auto-lite spark plugs?
I have a miss/stumble that I want to see if a set of Autolites will take care of but I cant seem to figure out which plug to use.

AutoLite book says,

1998-2000 part# 5243
2001-2002 part# 5245

I have heard part # 103 mentioned before also.

Why would the catalog specify a plug two heat ranges colder for a 1998-2000 LS1?

Part# 103 is the same heat range as a 5245 but says it has a different tip.

Part# 5243 is the coldest plug in that style.
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