Champion CCH991 Copper Plus Resistor Spark Plug - REA8MCX

Spark Plug Code: REA8MCX

Plug Type: REA8MCX.
Seat Type: Gasket.
Hex Size (Inch): 0.551.
Hex Size (MM): 14.
Thread Size (Inch): 0.472.
Thread Size (MM): 12.
Thread Reach (Inch): 1.043.
Taper Diameter (Inch): 0.2.
Installed Height: 1.99.
Insulator Projection (Inch): 0.12.
Gap (Inch): 0.033-0.038.
Gap (MM): 0.84-0.97.
Center Electrode Diameter (Inch): 0.078.
Center Electrode Material: Nickel Copper Alloy.
Ground Electrode Material: Nickel Copper Alloy.
Classification: Champion Copper Plus Small Engine.
Resistor Plug: Y.

Copper Plus spark plug has a copper core center electrode that allows for accurate control of heat range, optimizing performance, and longevity of the spark plug. Patented SAC-9 semi-conductor resistor for maximum EMI and RFI suppression. Patented Ultraseal coated shell for rust prevention.