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Champion Racing Spark Plugs RC12YC, gasket seat, .750" reach, 4-pack

Item number: CHA-71

Champion Copper Plus spark plugs have been original equipment on a wide variety of engines for many years. These plugs have nickel alloy centers and ground electrodes, with reasonably good wear characteristics. In addition, the extrusion of copper into the center electrode allows for increased conductivity and heat control.



  • Dependable and durable.
  • Built to ISO and SAE standards for proven performance.
  • Patented SAC-9 semi-conductor resistor for maximum EMI & RFI suppression.
  • Copper core center electrode allows for accurate control of heat range for longer life.
  • TinTac® and ULTRASEAL shell for best corrosion protection of any spark plug in the industry.
  • 4-pack. 



  • Center Electrode Diameter (IN):  0.1".
  • Center Electrode Tip Material:  Nickel.
  • Core Nose Length (IN):  0.700".
  • Electrical Terminal Type:  Non-Removable.
  • NutGap Style: J-gap.
  • Ground Electrode Core Material:  Nickel.
  • Ground Electrode Material:  Nickel-Copper Alloy.
  • Ground Electrode Quantity:  1.
  • Ground Electrode Tip Design:  J-Gap.
  • Hex Size (IN):  0.625".
  • Hex Size (MM):  15.880.
  • Hex Type:  Hex.
  • Indexed:  No.
  • Installed Height (in):  1.99".
  • Insulator Height (in):  0.06".
  • Insulator Projection (IN):  0.06".
  • Manufacturer Heat Range:  12.
  • Plug Type:  RC12YC.
  • Pre-Gap Size (IN):  0.035".
  • Pre-Gap Size (MM):  0.89".
  • Reach (IN):  0.75".
  • Resistor Type:  No.
  • Seat Type:  Flat.
  • Skirt:  No.
  • Taper Diameter (IN):  0.25".
  • Thread Diameter (IN):  0.551".
  • Thread Diameter (MM):  14.000.
  • Washer Included:  No.
  • Washer Type:  Crush.