Well there have been split fire and some other types but have never been that impressed when I have tried them in a car ...one of you guys by some and let us know..I have done my part and got it started....dont really see why having three places for the spark to jump would make much diffrence...although I have used the perma gap plugs on my boat motor...we will see if anyone has tried them maybe
Hey Guys New To The Forum Got 91 Springer . Use E 3 Plugs In 91 And 98 3 Cyl. Metros Seen A Definate Jump Of 5 MPG In 91 Metro .. Power ...Who Knows First Plug Ive Tried With Any gain Period.. I am impressed with them. May not be as noticable in a bigger motor. tempted to try in bike. Do you guys think they would burn to hot on the bike? Really want to try but not the expesne of my bike!!!!