Best spark plug for 5.3

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01-26-2014, 08:10 AM

#11

bobfig

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im running ac delco 41-110 and they are doing just fine.

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01-26-2014, 10:02 AM

#12

GREENSIERRA

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Join Date: Mar 2006

Location: Canada

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I have data logged ALOT of different plugs and wasted a lot of money doing it and my TR55IX seem to run the best with the least amount of miss fires.

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Killerado (04-23-2023)

01-28-2014, 09:36 AM

#13

Blwn99x

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Location: Lutz,FL (its called 'Lootz")

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N/A= tr55. nitrous=tr6 or tr7. boost=tr6 or tr7

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Killerado (04-23-2023)

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