Experience superior engine performance with these ACDelco GM Original Equipment Iridium Spark Plugs. Crafted with iridium, they offer excellent wear resistance, durability, and outstanding engine idle stability. The fine-wire electrode burns away carbon deposits, ensuring reliable cold starting and quick acceleration. A three-piece suppressor seal meters spark energy for long electrode life and blocks radio frequencies that could affect vehicle electronics. Designed and tested to rigorous standards, these spark plugs are an exact replacement for your vehicle's original components and are backed by General Motors.