If you get hold of someone who has half an idea at your local shop get them to get their ngk spark plug book out. In the front is an explanation of what all the letters and numbers mean in the spark plug part number. I can't remember of the top of my head what the difference is between the two part numbers you mentioned.
Good luck!
Driver of the yellow ae86
http://www.ae86drivingclub.com.au/fo...hlight=custard
I went down to super cheap and they had the right plug, which was the same as the one at the local place but 1mm shorter and $16 cheaper.
The old plugs were so carboned up that no spark at all was getting through.
I'll just have to give my engine a good hard rev everytime I drive it to clean the carbon off
Sounds like the engine needs a better tune at light throttle;
Anyway, The ES plug is a copper core electrode and the EP is a platinum plug.
I doubt that either plug would hit the piston.
Sprinter Veteran
I am using NGK BKR-6E11 only $15.00 for 4, I change them evert 3rd oil change, works great, I found that platinum plugs, will mis fire when they carbon up
I use Iridum plugs in my blacktop & 1UZ, dont have to change them that often
Sprinter Veteran
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