BRISK Premium DOR14LGS-T Spark Plug, 14mm thread, 3/4"(19mm) reach, 5/8'(16mm) hex, gasket seat, resistor, LGS Lamborghini semi-surface firing tip design, retracted integrated ground electrodes, silver center electrode, REDUCED electrode distance (gap). This spark plug is designed with reduced electrode distance for forced induction applications. Brisk 14 heat range is eqvivalent to NGK 7 heat range. For forced induction applications that require colder heat range spark plug, we recommend the BRISK Turbo Racing spark plugs or BRISK Silver Racing spark plugs. Popular applications: VW 1.8T Forced induction imports Please visit PLUG MODELS - LGS for more firing tip configuration information.