NGK CR9EIX Racing Spark Plug - Lotus Twin Cam / Cosworth BDG

This 10mm NGK Racing Spark plug is for cylinder heads that require 10mm spark plugs. Using the latest Iridium technology for maximum performance, this is this plug functions well in racing conditions. Heat range 9 - colder than standard, recommended for racing engines and competition applications Thread size: 10mm Hex size: 5/8" Electrode: Iridium fine wire Ground electrode : Standard Thread reach: 19.0mm Resistor: yes Note: Priced each, order 4 for a complete set. Applications: Lotus Twin Cam Racing with Cylinder Head that requires 10mm Spark Plugs Cosworth BDG