Bosch Platinum Plug, 85-86 Iron Head Corvette -1 Heat
Bosch platinum plugs have been the standard for decades, providing quicker starts, smoother acceleration, and giving top fuel efficiency. The 99.9% pure platinum center electrode with its revolutionary extended insulator design reaches self-cleaning temperature faster than any other plug, operates hotter at low speeds and runs cooler at high speeds, and has a lower ignition voltage requirement than copper core plugs for greater ignition reserve. And unlike other plugs, the effective spark gap remains constant throughout its service life, never needing a gap adjustment. These plugs are one heat range colder than stock and are sold individually for 85-86 Corvette with iron heads.