no bro i'm sorry but i don't have any info for ya. but here is one thing that can happen. a buddy of mine had dual plugs on his shovel we were on a ride one night when he blew a sparkplug out of the head. "it has happened to me" anyway the stock plug wasn't there but his second plug was still fine so it kept the fuel ignited. it was like a blowtorch directly onto his leg. by the time he got to the side of the road his knee was already half gone. two days later the hospital took the rest of the leg from the mid thigh down. thats why i have never looked into dual plugs good luck