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Best spark plug for 5.3
1 Attachment(s)
I've had the bosh plus 4. Piece of crap burnt Chevy dealer pulled the plug when I had issues with the mass air Guy told me just buy the ac delco plug any plug better for the money of iridium
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NGK TR55 gapped at .055". Replace every 20k miles.
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Originally Posted by TX Tahoe Z71
(Post 5185422)
NGK TR55 gapped at .055". Replace every 20k miles.
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^^^ I've read the same
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Stock AC Delco's Gapped to .040
They will go 100,000 plus miles. |
The only problem with the Iridium plugs is that older engines will foul them unlike Copper plugs which don't suffer from oiling as much.
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I've tried everything on the market and I can safely say that the best plugs are always the stock ones.
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I have ran the stock acdelco plugs in my 6.0 with both .055 and .040. I am currently running them at .040 when I changed the plugs and tried the .040 gap it seemed to run a little smoother but also kinda feels a little weaker, not sure if its just me or if I lost a little torque.
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Coming from multiple lsx cars.... they love ngk plugs. Thats all I've ever really used.
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STOCK plugs. 55's Still run them, with boost.
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