White Ceramic Auto Iridium Spark Plug Fix-Zfr5-11 for BMW 750li

White Ceramic Auto Iridium Spark Plug Fix-Zfr5-11 for BMW 750li. Iridium Electrode Material: Center electrode made of Iridium with melting point of 2454 degrees Celsius for superior durability. Laser Welding Technology: All-round laser welding combines resistance and welding tech to improve ignition stability and life. Improved Fuel Economy: Iridium spark plug spreads flame more frequently, substantially increasing fuel economy and ignitability. Faster Acceleration: 0.5mm center electrode shortens acceleration time by 0.7 to 1 second compared to normal spark plugs. Extended Service Life: Designed life is 80,000km with best economic life of 60,000km, significantly longer than standard plugs. Certified Quality: Products certified with TS16949 and ISO9001: 2000 standards ensuring high manufacturing quality. Easy Engine Starting: Powerful ignitability allows easy engine starting even under thin air and adverse environmental conditions. Platinum Ground Tip: Ground electrode features a platinum tip for good thermal conductive performance and stable ignition.