4 x NGK Standard Copper Core Spark Plugs for your Mitsubishi Lancer Evolution 1 CD9A If you bought from the Mitsubishi Dealer this is what they would supply. Manufacturers Part Number BP6ES NGK Stock Number 7811 Plug Diameter 14mm Thread Length 19mm Hex Nut 20.8mm Heat Range 6 NGK Spark Plugs are the workhorse at the heart of smooth-running engines around the world. OEM Quality Triple-Gasket Sealing Process Consistent Performance Plug of Choice in Millions of Vehicles See HERE for PDF regarding NGK Plugs.
