JC123
TJ Enthusiast
one more thing: before ordering 23151 I tried2350623099. NGK told me it is indicated for California emissions and is 14" long but the wiring connector didn't match up as shown in the photo I posted previously. that one could work for you, depending on your model year.
correction: I tried 23099. (that's what I get for being in a rush). so they told you the same thing they told me. that should be it as long as yours wasn't on the cusp of a model year change.