NGK Spark Plug CMR7A (7543)

 NGK Standard Spark Plug CMR7A / 7543

NGK Standard spark plugs are OE approved and recommended for reliable performance for most automotive and non-automotive applications. NGK Standard spark plugs feature a 5-Rib insulator design to prevent flashover and are also treated with corrosion-resistant plating to ensure ease of installation and removal. Cold rolled threads prevent damage to cylinder head. NGK's triple gasket sealing process virtually eliminates gas leakage past the shell. Solid Copper Core provides superior heat dissipation, conductivity and a broader heat range.

• Cold rolled threads - prevents damage to cylinder head

• Triple gasket sealing process - virtually eliminates gas leakage past the shell

• Solid Copper Core - provides superior heat dissipation, conductivity and a broader heat range

• Trivalent Plating - three step plating process utilizing silver chromate and zinc ensures maximum corrosion resistance

Product Features:​

• External Thread (Mm): 10 mm

• Key Opening: 16 mm

• Spark Plug: 1-electrode note / with flat sealing seat / SAE connection / No antiparasitic protection/ Nickel center electrode

• Thread Length: 9.5 mm

• Spark Position: 6 mm

Originals:

• Autolite 4194

• Brisk 3158

• Brisk SR15C

• Champion 978

• Champion RY4C

• Champion RY4CT10

• Dolmar 965603030