Champion 791 C57YC Spark Plug, 14mm, .750 Reach, Set of 8

Projected tip for gasoline. For Brodix and other aftermarket aluminum heads. For most magneto fired ignitions. Sprints and Late Models. 14mm plug, .750" reach, 5/8" hex.

Plug gap will depend on output of distributor and fuel being used. Most applications using methanol will be at .022" - .025". If your ignition system is a higher output, maybe able to go as wide as .030". Gas application should be .030" - .035". You should also consult manufacturer of distributor for their recommendations.

Champion Racing Series plugs include all the features of their conventional plugs, but are built with extreme engine conditions and durability in mind.

• Nickel Alloy Ground and Center Electrodes
• Copper Core Center Electrode Allows for Increased Conductivity and Heat Control
• 14mm, .750" reach, 5/8" hex
• Projected Core Nose
• Heat Range: Colder (57)
• Set of 8

Item Details

.750" Reach, 5/8" Hex

Spark Plug Application Chart

Spark Plug Gapping Instructions (GIF)

Champion Spark Plug Guide (JPG)

Champion Heat Range Guide (JPG)

Champion Conversion Chart (JPG)

Spark Plug Gapping Instructions (JPG)