This is an extreme Champion racing spark plug once used in 15:1 NASCAR superspeedway motors with a radically cut-back side electrode. Spark plug manufacturers usually spot-weld side electrodes to the ...

Side gapping your car's spark plugs could result in some modest performance gains. Here's what it means, how to do it, and ...

If your lawn mower runs on gas, then you've got a spark plug tucked inside the engine that plays a bigger role than you might think. Spark plugs are what fire up the engine in the first place. They ...