Iridium offers excellent engine idle stability and smooth performanceIridium allows for small, efficient electrode designs for reliable cold starting and quick accelerationIridium fine-wire electrode helps burn away carbon deposits on the tip of the plug as they formOne piece suppressor seal helps block radio frequencies that can affect vehicle electronicsSuppressor seal meters spark energy for long electrode life and helps prevent combustion leakageSome ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco ProfessionalACDelco GM Original Equipment parts are designed, engineered and tested to rigorous standards, and are backed by General MotorsGM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicleGM regularly updates production and service part designs to integrate new materials and technologies
