Spark plug Autolite or AC DELCO

AC Delco CR43TS.

Copper plugs are actually the best for performance, precious metals just last far longer.

I'd use the original equipment AC Delco plug. Rockauto has them for $6.31 each, with a $3 per plug rebate offered.

Ran Autolite Iridum XP XP3922 plugs in it and had zero issues at about half the price of the NGK plugs, and I had a mild tune.

At least with double iridium ACDELCO on the c5. It’s 100k intervals.

AC Delco double platinum spark plugs belong in that engine.

The new plug is AC Delco 41-156. Cannot tell any difference in my Gen 2 after replacing plugs. It ran fine before and did afterwards as well.

The plugs it had in it (autolite) didnt look great.

autolite, worst spark plugs in the world. I'm tired of customers asking for cheaper plugs and they cause misfire

Autolite are for cars your selling there super cheap and garbage

Do not under any circumstances put autolite spark plugs in anything you care about. Worst of the worst