- Ignition System Standard Replacement Spark Plug
- Manufacturer: Autolite
- Model Number: Spark Plug
- Part Number: 313
- Also known As: M42K, 0123, 123, W7EC, stk 7535, J4C, J4J, stk 825, 4040, W24S-U, stk 4040, 5612561, A2C, stk 79, X500, 3710, B7S, B8S, stk 3710, stk 3810, 14-2X, G7C