What is the difference between a rc12yc spark plug and a rc12yx?

The main difference between the RC12YC and RC12YX spark plugs lies in their design and intended applications. The RC12YC is typically designed for general automotive use, providing a good balance of performance and durability. In contrast, the RC12YX is often tailored for specific performance applications, featuring a different electrode design that may enhance ignition efficiency or heat dissipation. This makes the RC12YX suitable for high-performance engines or specific racing conditions, while the RC12YC is more versatile for everyday use.