Always check the gap. If someone at the dealer dropped a plug that could knock the gap out.

I always put anti-seaze on the threads when I change plugs. Aluminum heads are not forgiving!

Also don't crank the plugs down real hard, just tighten then enough to crush the seals. They are not lug bolts lots of torque can strip the head.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200