LT1-LT4 Modifications 1993-97 Gen II Small Block V8

What heatrange plugs are all you h/c guys running?

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Old 02-17-2007, 03:47 PM
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Default What heatrange plugs are all you h/c guys running?

Just wondering if everyone is running stock heat range, or colder on all their N/A heads/cam cars.
Old 02-17-2007, 03:52 PM
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I run NGK TR55's with the setup I have listed in my sig. If your going to spray run a TR6
Old 02-17-2007, 07:14 PM
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tr55's here...
Old 02-17-2007, 09:12 PM
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autolite 104's
Old 02-18-2007, 01:40 PM
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Hey do you have a part number for the autolite 104's and possibly the 103's too?
Old 02-18-2007, 02:08 PM
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autolite 104's are autolite 104's. The package says 104 on it...You can pick em up at walmart 2 per pack. I ran autolite 104's in my 04 Impala SS. I run tr55gpowers in the ta...
Old 02-18-2007, 04:05 PM
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TR 55's here too. Always have and never had a prob.
Old 02-18-2007, 05:17 PM
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Originally Posted by flyinZ
TR 55's here too. Always have and never had a prob.
Same here
Old 02-18-2007, 07:15 PM
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NGK BR7EF.
They work great for nitrous, and dont seem to hurt NA power eather.



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