7.4 liter spark plug

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Jul 1, 2021 | 7:29 AM

Chevy1999

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Joined: Nov 2019

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7.4 liter spark plug

Replacing AC Delco 41-993 with NGK Laser Iridium. The NGK’s are just slightly(1/16”) longer from base of threads to top of electrode. Any thoughts on using these NGK’s on a 1999 Chevy 7.4 vortec?

Jul 1, 2021 | 1:58 PM

oilcanhenry

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Joined: Oct 2017

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From: USA

Not enough to make any difference. NKG's are good plugs

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