Couple weeks ago I ordered some
Sonic Spark Plugs in Iridium IX flavor (BKR5EIX-11).
Now these plugs have a hole drilled in the ground electrode. When a spark is sent it hits that hole, produces a spark and sends and ultra sonic sound that breaks down the fuel for a better combustion.
I will be testing these plugs out to see how they feel when driving and with gas mileage and compare to the other spark plugs that I have.
Pictures:
