Champion Spark Plug 686 Spark Plug

Buyer fitment guide only intended as reference. Please use catalogue search by vehicle to ensure proper fitment.

• Autolite 2611
• Champion Spark Plug N1
• Champion Spark Plug N57
• ACDelco S40XL
• Motorcraft AG501
• Champion Spark Plug N84
• Champion Spark Plug N84G
• Champion Spark Plug N59G
• ACDelco S40XLR
• Champion Spark Plug C57
• Motorcraft AG501X
• DENSO 4062
• NGK B10ES
• NGK B9EG
• Prestolite CR56869
• Bosch F09CS
• Champion Spark Plug QN1
• NGK R5671A10
• DENSO W31ESU

• CORROSION RESISTANCE -- Coated shell provides corrosion resistance in harsh environments
• EXCEPTIONAL COMBUSTION & STRENGTH -- Delivers rapid, consistent combustion and withstands the intense mechanical forces of racing environments
• HANDLES EXTREME HEAT & PRESSURE -- Maintains spark integrity and structural stability during sustained high-RPM, high-heat operation
• HIGH-STRENGTH CERAMIC INSULATOR -- High-strength ceramic formulation resists dielectric puncture and maintains consistent voltage under extreme ignition loads
• PROJECTED SURFACE-GAP DESIGN -- Positions the spark deeper in the combustion chamber to improve flame initiation and manage gap growth over race duration
• RACE-TUNED HEAT RANGE CONTROL -- Correct heat range selection helps control plug temperature, prevent pre-ignition and maintain maximum power throughout the race
• Built for extreme conditions on the track, Champion© Racing spark plugs deliver rapid, consistent combustion, resist dielectric puncture, and maintain spark integrity under intense heat and pressure. A projected surface€‘gap design and precise heat range help sustain peak performance.