NGK Copper Core Spark Plug – Heat Range 9 The best plugs for imports running any type of forced induction have always been NGK Copper Spark Plugs. Anyone who has been around the Mitsubishi Eclipse, the Eagle Talon, Plymouth Laser, Mitsubishi Galant, Lancer EVO 1-3, know that there is no wasting time with anything but NGK R Spark Plugs! Features Trivalent metal plating provides superior anti-corrosion and anti-seizing properties Corrugated ribs prevent flashover Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer Copper core aids in heat removal Triple seals prevent leakage Specifications Thread Size: 14mm Thread Pitch: 1.25mm Seat Type: Gasket Resistor Value: 10K Ohm Reach: 19mm (3/4″) Hex Size: 13/16″ (21mm) Terminal Type: Solid Overall Height: JIS Gap: .028″ (0.7mm) Applications 1990-1999 1G / 2G DSM 2003-2006 Mitsubishi Evo 8/9 What’s In The Box? (1) Spark Plug (NGK 7788) Warranty Manufacturer Standard Warranty