09 GMC Sierra 6.2 Spark Plugs & Wires

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Sep 14, 2013 | 12:34 AM

#11

Medic/Z28

TECH Enthusiast

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Joined: Apr 2005

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From: Central TX

I used to run NGKs TR55s with MSD wires on LS1 and then on my LQ4 HD I did as well. When I got this truck I did NKGs again on the factory's wires when I got her at 60,000 miles. After headers I did 100,000 miles service and went stock plugs and wires. Honestly I feel it runs better with stock.

Sep 14, 2013 | 06:30 AM

#12

rijrunr

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Joined: Sep 2011

Posts: 194

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From: Pittsburgh PA

Quote:

Originally Posted by 03sierraslt

For your mods I see no reason to run a colder then factory plug, so stock plugs and a decent set of wires.

Yea, unless you are planning to spray, stock plugs work great. Honestly, I think my stock plugs from the factory performed best and balanced over duration. I'm spraying now, so I went colder.