Bosch Iridium Spark Plugs are engineered to deliver both high performance and long life, representing the best of OE spark plug technology. Bosch Double Iridium Pin-to-Pin technology features 2 iridium-alloy electrodes - an iridium-alloy firing pin and iridium-alloy pin laser-welded onto the ground electrode. This design offers higher performance by allowing more efficient flame-kernel growth and up to 4 times longer life compared to standard copper spark plugs Product Features:Double Iridium electrodes - iridium-alloy firing pin and an iridium-alloy pin laser-welded onto the ground electrode offer higher performance and up to 4 times longer life compared to standard copper spark plugsOE Fine Wire design requires up to 24% less voltage to ignite360 degree continuous laser welding increases durability for increased lifeCopper core provides broader heat range to resist pre-ignition and fouling
