NGK Laser Iridium spark plugs offer the best combination of performance and longevity. Engineered specifically for OE applications, Laser Iridium spark plugs are tested to the highest standards to ensure quality and durability. Iridium tipped center electrode provides durability six times harder than platinum. NGKs high grade pure alumina ceramic and 98 percent pure copper core prevents the spark plug from overheating while providing reliable starts. Most Laser Iridium spark plugs feature a platinum pad on the ground electrode for even wear in distributorless ignition systems. NGK Laser Iridium spark plugs offer the best combination of performance and longevity. Actual OE or equivalent replacement spark plug. CHEVROLET COBALT 2010-09, COLORADO 2012-10, HHR 2011-09, MALIBU 2012-09; GMC CANYON 2012-10; HUMMER H3 2010, H3T 2010; ISUZU I-370 2007; PONTIAC G6 2010; SATURN AURA 2009, SKY 2010-09