Bosch Auto 9723 Bosch Iridium Spark Plug (Pack of 4)

Iridium center electrode firing pin provides exceptional ignitability. 360 degree continuous laser welded center electrode provides unmatched resistance to thermal shock that can occur in today's high performance engines. Copper core provides broader heat range to resist pre-ignition and fouling. Nickel-plated rolled threads provide superior resistance to corrosion and do not require anti-seize - saving time. Factory-set pre-gap ensures ease of installation. Bosch Iridium Spark Plugs are engineered to deliver both high performance and long life, representing the best of OE spark plug technology. The ultra-fine wire iridium center electrode firing pin delivers best performance. Unlock the performance in your engine with Bosch Iridium Spark Plugs.