E3 vs. NGK

[x18]

well I have the NGK cr7-hix iridium plug it works good but Im gonna get a new spark plug which is better E3 or NGK and i want to switch out the spark plug wire which should i get, oh and what E3 spark plug is the right one dunno

[Blitz$M.Inc.$]

i have the iridium and the nology coil and hotwires set thumbsup2
never tried E3

[125ccCrazy]

I put E3 plugs im the 2 strokes I built and they worked great, I want to find a part number for the E3 plug for the 4 strokes...hopefully they make one for our engines..

hers a conversion chart but I dont see the c7 on there, not sure if any other numbers will cross reference over for us..

I'm guessing either the E 3:30 or E3:36.... not sure which one has the bigger and smaller threads...

http://e3sparkplugs.com/catalog.htm