Awhile back i remember seeing a thread that was curiouse when they switched the heads. Well i cant find that thread again. Long story short I put new plugs in my 03 this week and use alittle piece of fine wire to count the threads in the heads. I have the 8 thread heads.
Build date is- 7-29-03
Car number is- 8331 of 8394
Build date is- 7-29-03
Car number is- 8331 of 8394