There's a lot of different spark plugs available, any experts out there who have a preference? Do those quad-4 ones work or are they a crock, like I've heard about the splitfire? And which ones do the Z come with anyway? Anyone checked yet?

 

The Z comes with platinum tipped coil on plug setup which is probably pretty darn good. Maintenance spec says not change them until 100k miles.

Unless you are using forced induction why change them? The gains you will see are going to be minimal at best.

 

Every little bit helps...plus it's inexpensive. But if the ones in there already are decent, I guess I won't mess with them.