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All-in-one: Maintenance and Part Numbers

61K views 57 replies 21 participants last post by  Mike S  
Out of the 3 plugs listed in this thread, which is the best to go with for a non tuned VT? I see allot of talk about the NGK 1422 but it seems those might be geared around the tuned VTs more. Cost isn't my concern but if there is a better plug than OEM I'd like to buy it. Allot of talk going on about plugs in several different threads so wanted to know for sure.


  • OEM: NGK SILZKR6D8E
  • Autolite: Autolite XP5703
  • NGK 1 step cooler: NGK ILKRE6 1422