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Old 09-22-2018, 02:46 AM
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Default sparks plugs

2003 gmc pick up 6.0 2500 hd. searching for the best spark plugs
Old 09-22-2018, 07:58 AM
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Not something you would run on a NOS application but I have NGK TR6IX plugs in my 03. Not saying it's the best plugs to use but they're working much better than the Bosch Platinum 4's previously installed.
Old 09-24-2018, 03:49 AM
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Originally Posted by 01CamaroSSTx
Not something you would run on a NOS application but I have NGK TR6IX plugs in my 03. Not saying it's the best plugs to use but they're working much better than the Bosch Platinum 4's previously installed.
ok thanks
Old 09-24-2018, 10:26 AM
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Iridium plugs. You get close to the conductivity of copper plugs without the rapid wear. The only downside is they're the most expensive plugs but when you figure $8 a plug vs $5 for something you'll do once every few to several years, the price difference is a nonstarter.

Mine's a '96 C1500 and I've got the ACDelco 41-993 iridium plugs. Work great.
Old 09-26-2018, 07:50 AM
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Some standard NGK tr55 plugs will work fine.




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