Champion Spark Plug C57CX
C Series 14 mm thread, .750" reach
5/8" hex. Regular Tip, Cool.
This cut-back ground (non-projected gap) style positions the spark approximately 1/16 inch into the combustion chamber with a modified (shortened) ground electrode. This helps expose the spark to the mixture and protects against pre-ignition from an overheated ground electrode.
Replaces discontinued Champion C57C, N57, and N541C plugs.