Autolite 388 Spark Plug

Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. Designed and engineered in the USA, Autolite Double Platinum spark plugs feature platinum-to-platinum firing which virtually eliminates gap erosion, reduces misfires and increases durability of the plug. Consider upgrading to Autolite Iridium XP spark plugs for increased performance.

Copper-glass seal bonds insulator, terminal post center electrode together, assures full required voltage at spark gap, gas-tight seal (100% leak proof) Multi-rib insulator reduces danger of "flash-over" One-piece terminal post adds strength Resistor reduces radio frequency interference (RFI) and electrode erosion