Which Spark Plugs Do You Recommend? (2003 Signature Series w/ 80k mi)
Looking for guidance in selecting new plugs for my 2003 Signature series w/ 80k miles.
I'm in the middle of doing the intake manifold and thought it might be a good moment to swap the set with some fresh ones.
I saw Autolite AP104's as an option. Then I saw APP104's (double platinum) for a couple bucks more each. Is there any reason to choose one over another?
Let me know what you all think