LONG HISTORY - In 1961, Zhuzhou spark plug. Co.,ltd. was established at Lukou, Zhuzhou, CHINA. In 1993 was listed as Shenzhen stock exchange. In 2003 has become chinas largest spark plug production and R&D base.Subsequently, bought the full set of equipment and technical patent from DELPHI U.S.A. Spark plug factory, ride into the forefront of the world SPECIFICATIONS - Spark Plugs L7RTC Thread Size:M14*1.25MM, Thread Reach:9.5MM, Hexagon Size:19MM.Please check for correct specifications and measurements for your application COMPATIBILITY - Spark Plug L7RTC Replace for Champion 859/RCJ7Y 863/RCJ8Y 852/RCJ6Y 853/CJ7Y 848/CJ8Y 858/CJ6Y, for L7RTC L7TC,for NGK 6703/BPMR7A/4626 2533/BPM7A BPMR6A, for BOSCH WSR5F 7547/WSR6F WS5F WS6F WKA225T6, for DENSO stk 6043/W22MPR-U W22MP-U,for Autolite 2974 2976 XST2974,for Brisk PR15Y,for Beru 14S-5F 225/14/5AMX,for Enker FSC75CP. PERFORMANCE - Longer Service Life Fast Starts Reduce Emissions Improve Fuel Efficiency Stable Performance. APPLICATIONS - Spark plugs are an important part of the ignition system of gasoline or gas engines, and are widely used in many fields such as automobiles, motorcycles, aircraft, garden tools, yachts and industrial engines. specifically dgned to increase power, reduce fuel consumption and improve hydrocarbon emissions.