E3 SPARK PLUGS

No difference from Split fire 's sales pitch,20+ years ago...
Just a sales pitch,to burn pocketbook.Had great luck with Autolite,also use NGK .....
If you want a shorter ground strap,on your Autolite,add an AR prefix,O Really 's stocks 'em,
https://www.google.com/url?sa=t&sou...To0wpRv6HmOZLG0IA&sig2=yeJLQEfRPKWFUPpRkJ7abw
Actually what you're running primary & secondary ignition,would help here.....
For added bonus...
SPARK PLUG CROSS REFERENCE
Have fun....