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Discussion Starter #1
I have an ac delco plug part # FR3LS6. Can anyone tell me the heat range. I'm guessing it 3 or 6 but can be wrong. They make another plug that is a fr3ls. Also what the difference between those two part numbers
 

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Discussion Starter #3
When I click that link it says no hot linking allowed...what's up with that..lol. seriously wont let me in
 
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