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NGK Standard Spark Plug 7543 CMR7A

NGK Standard Spark Plug 7543 CMR7A

NGKCMR7A (10 in stock)


Regular price $3.99 Sale

NGK standard plugs are constructed for longer life and optimum performance.

  • Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
  • Corrugated ribs prevent flashover
  • Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer
  • Copper core aids in heat removal
  • Triple seals prevent leakage
  • MPN: CMR7A


Warranty 1 Year
Torque Specs Cast Iron: 7.2-10.8 lb. ft. Aluminum: 7.2-8.7 lb. ft.
Brand NGK
Heat Range 7
Longevity 30k Miles
Resistor Yes


Thread Size 10mm
Thread Pitch 1.0mm
Seat Type Gasket
Resistor Value 10K Ohm
Reach 9.5mm (3/8")
Hex Size 5/8" (16mm)
Terminal Type Solid
Overall Height Bantam
Gap .028" (0.7mm)

Center Electrode

Material Nickel
Type Standard
Size 2.5mm
Projection Non-Projected

Ground Electrode

Material Nickel
Type Standard
Quantity 1



Sorry, no automotive applications are associated with this part.