INDEXING TOOL AND WASHERS FOR 14MM SPARK PLUGS

The term "indexing" when referring to spark plugs, is the process of adjusting the spark plug electrode to the correct position in the combustion chamber. More complete combustion and consequently more horsepower is developed by indexing the electrode gap toward the center of the piston, favoring the exhaust side if possible.

Mid-USA Part Number: 10605

UOM: EA