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Which spark plug

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Old 07-10-2017, 10:21 PM
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Default Which spark plug

Fixing to do a spark plug change on my new ride.

SCPC 413ci LS2
11.5:1 comp
fast intake
big mouth tb
243 heads
begween mild and wild cam

car makes 498whp, thinking about adding 100 shot, also drive it around town a lot.

which spark plug?

Last edited by ballfroguy; 07-10-2017 at 10:48 PM.
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Old 07-11-2017, 10:14 AM
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Default Autolite Nascar "x" Racing

Hi Frog, I would fit an Autolite 3923x Racing Plug AND consider a 3922x for track use.

Lance
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Old 07-11-2017, 11:03 AM
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Quick question, I have an LS2 6.0, would the ls1 plugs work?
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Old 07-16-2017, 04:19 AM
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I have been using LS7 plugs (GM also installs them in supercharged Corvettes) in my supercharged LS2 with great success. I've installed them 3 years ago and I check them yearly only to find that they are still perfect; you can't go wrong, install them and forget about them.. Rockauto has them and there is a rebate on them which makes them a great buy. 2008 Corvette LS7: ACDELCO 41104 Professional; Iridium
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Old 07-16-2017, 08:16 PM
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NGK TR6 for your combo.
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Old 07-17-2017, 12:49 AM
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^^^^ Second that, TR6 gapped at .040
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