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whats the best spark plugs

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Old 08-26-2006, 09:15 AM
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Default whats the best spark plugs
i have a stock ls1 in my 00 SS (exhaust, lid, filter, free mods) & i was wondering what plugs would be a good upgrade. i just bought some msd wires
& figured i would get more out of em with new plugs too.

what yall say
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Old 08-26-2006, 09:23 AM
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NGK tr55 gaped at 50.
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Old 08-26-2006, 10:28 AM
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i want to know this as well
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Old 08-26-2006, 10:32 AM
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ngk tr55. hands down for N/A
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Old 08-26-2006, 11:04 AM
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NGKs appear to be the most popular plug for ls1s.
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Old 08-26-2006, 11:16 AM
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Thats what im runnning.
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Old 08-26-2006, 03:10 PM
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i'd say over 75% of the people on this site are running the NGK plugs
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Old 08-26-2006, 03:13 PM
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Default Yes sir
Yes sir,im another ls1 running ngk tr55 with msd 8.5's.
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Old 08-27-2006, 12:22 AM
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Originally Posted by Black Plague
NGK tr55 gaped at 50.

gapped mine to .055
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Old 08-27-2006, 12:51 AM
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Pull the TR6 out of the box and just make sure the gaps are good. run those mothers!
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Old 08-27-2006, 01:15 AM
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delco iridiums...and they run fine
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Old 08-27-2006, 01:31 AM
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Denso Iridiums
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Old 08-27-2006, 07:04 AM
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Ngk...
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Old 08-27-2006, 08:44 AM
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NGK Tr55, can't go wrong.
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Old 08-27-2006, 08:55 AM
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NGK TR55's.
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Old 08-27-2006, 11:50 AM
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NGK TR-55's
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Old 08-27-2006, 01:29 PM
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Originally Posted by staringback05
delco iridiums...and they run fine

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Old 08-27-2006, 05:06 PM
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thanks everybody, ill check all those out
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Old 08-27-2006, 05:23 PM
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Originally Posted by staringback05
delco iridiums...and they run fine
what did you gap them at?
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Old 08-27-2006, 11:01 PM
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not sure how it is with delco, but my denso iridiums are pregapped, just put them in. the iridium tip is soo much smaller that using a gap tool to set them would very likely break the tip.
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