Review on π₯ ACDelco GM Original Equipment 41-993 Iridium Spark Plug: High-Performance Ignition Component by Paul Zimmer
OEM Spark Plugs for Vortec 5.7 liter
OEM replacement part for Vortec 5.7 engines. Plus others I'm sure. But specifically I have a 1997 Silverado, 5.7 engine. Please do not plug in these plugs. They are factory installed and must not be tampered with. The very small iridium electrode is fragile and should be left alone. If the boxes are damaged and the slots look closed, send them back for a replacement. Otherwise, just apply a non-stick coating and install as is. OEM connectors are always the best choice.
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