Maximize engine performance and reliability with the Autolite Copper Spark Plug 4316. Engineered with a full copper core electrode, this spark plug delivers consistent ignition in all conditions, ensuring optimal power, fuel efficiency and smooth starts...

Upgrade your engine’s reliability with the Autolite Copper Spark Plug 4303, designed to deliver consistent ignition and superior performance. Its full copper core, paired with a copper-glass seal, ensures maximum voltage reaches the spark gap while...

Ensure dependable starts and smooth engine performance with the Autolite Copper Spark Plug 4302. Designed with a full copper core and copper-glass seal, it delivers maximum voltage to the spark gap while maintaining a 100% leak-proof, gas-tight seal. The...