Double spark plug benefits and harms

Hi there are people who have information about the spark plug or have it installed.

My friend `` DOUBLE SPARK PLUG ''? `` DOUBLE NAIL SPARK PLUG ''? I think you want to say double-clawed, the other is impossible unless it is made. It is not possible to do double damage, it is beneficial on the contrary.

Yes, I need to have double fingernail spark plug, I wrote wrong.

I've never used it but I'm wondering if you use it, we expect comments

If I ask the master, it will be positive, I will try and give information immediately.

Anyway, do not try 4 nails ... it can break the idle in injection vehicles ...

Yes, I have heard all four nails, but I know it will damage these vehicles